Hallo zusammen,
ich habe vermutlich das gleiche Problem, ich nutze die 14.3.1 mit der Option “–download-quit”:
INFO  2025-10-06 20:40:29,607  [AWT-EventQueue-0] mediathek.Main (Main.java:260) - Configuring for non-portable mode
INFO  2025-10-06 20:40:29,828  [AWT-EventQueue-0] mediathek.Main (Main.java:402) - Registering C:\Users\Dominik\.mediathek3\flatlaf as custom FlatLaf config folder
INFO  2025-10-06 20:40:30,087  [AWT-EventQueue-0] mediathek.Main (Main.java:207) - Programmstart: 2025-10-06T20:40:30.0856611
INFO  2025-10-06 20:40:30,087  [AWT-EventQueue-0] mediathek.Main (Main.java:208) - Version: 14.3.1
INFO  2025-10-06 20:40:30,088  [AWT-EventQueue-0] mediathek.Main (Main.java:210) - === Java Information ===
INFO  2025-10-06 20:40:30,088  [AWT-EventQueue-0] mediathek.Main (Main.java:212) - Vendor: BellSoft
INFO  2025-10-06 20:40:30,088  [AWT-EventQueue-0] mediathek.Main (Main.java:213) - VMname: OpenJDK 64-Bit Server VM
INFO  2025-10-06 20:40:30,089  [AWT-EventQueue-0] mediathek.Main (Main.java:214) - Version: 24
INFO  2025-10-06 20:40:30,089  [AWT-EventQueue-0] mediathek.Main (Main.java:215) - Runtime Version: 24+37
INFO  2025-10-06 20:40:30,089  [AWT-EventQueue-0] mediathek.Main (Main.java:217) - Maximum Memory: 16256 MB
INFO  2025-10-06 20:40:30,089  [AWT-EventQueue-0] mediathek.Main (Main.java:219) - Operating System: Windows 11
INFO  2025-10-06 20:40:30,089  [AWT-EventQueue-0] mediathek.Main (Main.java:220) - OS Version: 10.0
INFO  2025-10-06 20:40:30,090  [AWT-EventQueue-0] mediathek.Main (Main.java:221) - OS Arch: amd64
INFO  2025-10-06 20:40:30,123  [AWT-EventQueue-0] mediathek.Main (Main.java:223) - OS Dark Mode enabled: false
INFO  2025-10-06 20:40:30,124  [AWT-EventQueue-0] mediathek.Main (Main.java:226) - OS Available Processors: 12
DEBUG 2025-10-06 20:40:30,124  [AWT-EventQueue-0] mediathek.Main (Main.java:110) - === JavaVM Parameter ===
DEBUG 2025-10-06 20:40:30,124  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dexe4j.semaphoreName=Local\c:_tools_mediathekview_mediathekview.exe
DEBUG 2025-10-06 20:40:30,124  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dexe4j.isInstall4j=true
DEBUG 2025-10-06 20:40:30,125  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dexe4j.moduleName=C:\Tools\MediathekView\MediathekView.exe
DEBUG 2025-10-06 20:40:30,125  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dexe4j.tempDir=
DEBUG 2025-10-06 20:40:30,125  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dexe4j.unextractedPosition=0
DEBUG 2025-10-06 20:40:30,125  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Djava.library.path=c:\tools\mediathekview\jre\bin;C:\Program Files\BellSoft\LibericaJDK-11\bin\;C:\Program Files\BellSoft\LibericaJDK-17\bin\;C:\Program Files\Python311\Scripts\;C:\Program Files\Python311\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\AOMEI\AOMEI Backupper\7.2.3;C:\Program Files\Git\cmd;C:\Program Files\PuTTY\;C:\Program Files\dotnet\;C:\Program Files\TortoiseGit\bin;C:\Program Files\ShareFile\ShareFile for Windows\;C:\Program Files\Docker\Docker\resources\bin;C:\Program Files\Meld\;C:\Users\Dominik\AppData\Local\Programs\Microsoft VS Code\bin;C:\Users\Dominik\AppData\Roaming\Python\Python311\Scripts;C:\Users\Dominik\AppData\Roaming\Python\Python311;C:\Tools\ffmpeg-6.1.1-full_build-shared\bin;C:\Users\Dominik\AppData\Roaming\Python\Python311\site-packages\libusb\_platform\_windows\x64;C:\Users\Dominik\AppData\Roaming\Python\Python311\site-packages\libusb\_platform\_windows\x86;C:\Users\Dominik\AppData\Local\Microsoft\WindowsApps;
DEBUG 2025-10-06 20:40:30,125  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dexe4j.consoleCodepage=cp0
DEBUG 2025-10-06 20:40:30,126  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -XX:+UseShenandoahGC
DEBUG 2025-10-06 20:40:30,126  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -XX:ShenandoahGCHeuristics=compact
DEBUG 2025-10-06 20:40:30,126  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -XX:MaxRAMPercentage=50.0
DEBUG 2025-10-06 20:40:30,126  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -XX:+UseStringDeduplication
DEBUG 2025-10-06 20:40:30,126  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - --enable-native-access=ALL-UNNAMED
DEBUG 2025-10-06 20:40:30,126  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - --add-modules=jdk.incubator.vector
DEBUG 2025-10-06 20:40:30,127  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - --add-exports=java.desktop/sun.swing=ALL-UNNAMED
DEBUG 2025-10-06 20:40:30,127  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -DexternalUpdateCheck
DEBUG 2025-10-06 20:40:30,127  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dinstall4j.launcherId=59
DEBUG 2025-10-06 20:40:30,127  [AWT-EventQueue-0] mediathek.Main (Main.java:114) - -Dinstall4j.swt=false
DEBUG 2025-10-06 20:40:30,127  [AWT-EventQueue-0] mediathek.Main (Main.java:116) - ========================
INFO  2025-10-06 20:40:30,127  [AWT-EventQueue-0] mediathek.Main (Main.java:121) - Startparameter: --download-quit
INFO  2025-10-06 20:40:30,129  [AWT-EventQueue-0] mediathek.Main (Main.java:698) - Verzeichnis Einstellungen: C:\Users\Dominik\.mediathek3
DEBUG 2025-10-06 20:40:30,677  [AWT-EventQueue-0] config.MVConfig (MVConfig.java:35) - User-Agent: MediathekView
INFO  2025-10-06 20:40:30,678  [AWT-EventQueue-0] config.Daten (Daten.java:193) - Konfig wurde gelesen!
DEBUG 2025-10-06 20:40:32,951  [AWT-EventQueue-0] update.ProgramUpdateCheck (ProgramUpdateCheck.java:134) - ProgramUpdateCheck Started.
INFO  2025-10-06 20:40:35,332  [ForkJoinPool.commonPool-worker-1] reader.FilmListReader (FilmListReader.java:505) - Liste Filme gelesen am: 06.10.2025, 20:40
INFO  2025-10-06 20:40:35,333  [ForkJoinPool.commonPool-worker-1] reader.FilmListReader (FilmListReader.java:507) -   erstellt am: 06.10.2025, 11:25
INFO  2025-10-06 20:40:35,333  [ForkJoinPool.commonPool-worker-1] reader.FilmListReader (FilmListReader.java:508) -   Anzahl Filme: 637896
INFO  2025-10-06 20:40:35,334  [ForkJoinPool.commonPool-worker-1] daten.FilmListMetaData (FilmListMetaData.java:96) - Die Filmliste ist 555 Minuten alt
INFO  2025-10-06 20:40:35,334  [ForkJoinPool.commonPool-worker-1] filmlisten.FilmeLaden (FilmeLaden.java:194) - 
INFO  2025-10-06 20:40:35,334  [ForkJoinPool.commonPool-worker-1] filmlisten.FilmeLaden (FilmeLaden.java:181) - Alte Liste erstellt am: 06.10.2025, 11:25
INFO  2025-10-06 20:40:35,334  [ForkJoinPool.commonPool-worker-1] filmlisten.FilmeLaden (FilmeLaden.java:182) -   Anzahl Filme: 637896
INFO  2025-10-06 20:40:35,370  [ForkJoinPool.commonPool-worker-1] filmlisten.FilmeLaden (FilmeLaden.java:183) -   Anzahl Neue: 637896
INFO  2025-10-06 20:40:35,571  [ForkJoinPool.commonPool-worker-1] filmlisten.FilmeLaden (FilmeLaden.java:214) - Filmliste laden (Netzwerk)
INFO  2025-10-06 20:40:35,635  [AWT-EventQueue-0] daten.ListeDownloads (ListeDownloads.java:55) - Filme in Downloads eintragen
INFO  2025-10-06 20:40:35,638  [AWT-EventQueue-0] config.Daten (Daten.java:348) - -------------------------------------------------------
INFO  2025-10-06 20:40:35,639  [AWT-EventQueue-0] config.Daten (Daten.java:349) - Einstellungen sichern
INFO  2025-10-06 20:40:35,640  [AWT-EventQueue-0] config.Daten (Daten.java:376) - Einstellungen wurden heute schon gesichert
INFO  2025-10-06 20:40:35,640  [AWT-EventQueue-0] config.Daten (Daten.java:383) - -------------------------------------------------------
DEBUG 2025-10-06 20:40:35,647  [AWT-EventQueue-0] controller.IoXmlSchreiben (IoXmlSchreiben.java:220) - Daten Schreiben nach: C:\Users\Dominik\.mediathek3\mediathek.xml
DEBUG 2025-10-06 20:40:35,647  [AWT-EventQueue-0] controller.IoXmlSchreiben (IoXmlSchreiben.java:245) - Config Schreiben nach: C:\Users\Dominik\.mediathek3\mediathek.xml startet
DEBUG 2025-10-06 20:40:35,683  [AWT-EventQueue-0] controller.IoXmlSchreiben (IoXmlSchreiben.java:269) - Config Schreiben beendet
DEBUG 2025-10-06 20:40:35,689  [AWT-EventQueue-0] update.AutomaticFilmlistUpdate (AutomaticFilmlistUpdate.java:34) - AutomaticFilmlistUpdate Started.
INFO  2025-10-06 20:40:35,864  [FilmeImportierenAutoThread] http.MVHttpClient (MVHttpClient.java:127) - MVHttpClient: Proxy not configured
INFO  2025-10-06 20:40:43,107  [] mainwindow.MediathekGui (MediathekGui.java:238) - Auto DL and Quit: Updating filmlist...
INFO  2025-10-06 20:40:43,108  [] filmlisten.FilmeLaden (FilmeLaden.java:194) - 
INFO  2025-10-06 20:40:43,109  [] filmlisten.FilmeLaden (FilmeLaden.java:181) - Alte Liste erstellt am: 06.10.2025, 19:25
INFO  2025-10-06 20:40:43,109  [] filmlisten.FilmeLaden (FilmeLaden.java:182) -   Anzahl Filme: 83
INFO  2025-10-06 20:40:43,109  [] filmlisten.FilmeLaden (FilmeLaden.java:183) -   Anzahl Neue: 0
INFO  2025-10-06 20:40:43,109  [] mainwindow.MediathekGui (MediathekGui.java:241) - Auto DL and Quit: Filmlist update done.
INFO  2025-10-06 20:40:43,109  [] mainwindow.MediathekGui (MediathekGui.java:242) - Auto DL and Quit: Loading Abos...
ERROR 2025-10-06 20:40:43,120  [] mainwindow.MediathekGui (MediathekGui.java:253) - Auto DL and Quit: error starting downloads
java.util.ConcurrentModificationException: java.util.ConcurrentModificationException
	at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) ~[?:?]
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?]
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:483) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask.getException(ForkJoinTask.java:555) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:573) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:663) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:677) ~[?:?]
	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:162) ~[?:?]
	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:176) ~[?:?]
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:264) ~[?:?]
	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:636) ~[?:?]
	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:810) ~[?:?]
	at mediathek.daten.ListeAbo.setAboFuerFilm(ListeAbo.java:210) ~[MediathekView.jar:?]
	at mediathek.mainwindow.MediathekGui.lambda$new$11(MediathekGui.java:243) [MediathekView.jar:?]
	at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:128) [guava-33.4.8-jre.jar:?]
	at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:74) [guava-33.4.8-jre.jar:?]
	at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:80) [guava-33.4.8-jre.jar:?]
	at java.base/java.util.concurrent.ThreadPerTaskExecutor$TaskRunner.run(ThreadPerTaskExecutor.java:291) [?:?]
	at java.base/java.lang.VirtualThread.run(VirtualThread.java:466) [?:?]
Caused by: java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1722) ~[?:?]
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:570) ~[?:?]
	at java.base/java.util.stream.ForEachOps$ForEachTask.compute(ForEachOps.java:293) ~[?:?]
	at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:759) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:507) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1394) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1970) ~[?:?]
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:187) ~[?:?]
DEBUG 2025-10-06 20:40:43,135  [AWT-EventQueue-0] update.AutomaticFilmlistUpdate (AutomaticFilmlistUpdate.java:44) - AutomaticFilmlistUpdate closed.
DEBUG 2025-10-06 20:40:43,135  [AWT-EventQueue-0] update.ProgramUpdateCheck (ProgramUpdateCheck.java:143) - ProgramUpdateCheck closed.
DEBUG 2025-10-06 20:40:43,504  [AWT-EventQueue-0] controller.IoXmlSchreiben (IoXmlSchreiben.java:220) - Daten Schreiben nach: C:\Users\Dominik\.mediathek3\mediathek.xml
DEBUG 2025-10-06 20:40:43,505  [AWT-EventQueue-0] controller.IoXmlSchreiben (IoXmlSchreiben.java:245) - Config Schreiben nach: C:\Users\Dominik\.mediathek3\mediathek.xml startet
DEBUG 2025-10-06 20:40:43,512  [AWT-EventQueue-0] controller.IoXmlSchreiben (IoXmlSchreiben.java:269) - Config Schreiben beendet
INFO  2025-10-06 20:40:44,054  [AWT-EventQueue-0] tool.RuntimeStatistics (RuntimeStatistics.kt:26) -    --> Start:    2025-10-06T20:40:30.0856611
INFO  2025-10-06 20:40:44,055  [AWT-EventQueue-0] tool.RuntimeStatistics (RuntimeStatistics.kt:27) -    --> Ende:     2025-10-06T20:40:44.0544344
INFO  2025-10-06 20:40:44,057  [AWT-EventQueue-0] tool.RuntimeStatistics (RuntimeStatistics.kt:28) -    --> Laufzeit: 0h 0m 13s
Gibts schon Ideen wie’s weitergeht?