JOSM blocking itself updating broken plugin

[Bürste]

Steps I did:

-closing JOSM r2130 (javaw.exe has stopped probably)
-downloading and overwriting with the latest version
-starting the latest version
-validator failed start, deactivating
-switch to setting, load list, and updating plugins, readding validator
-file-> quit
-starting JOSM again errormessage 1 and 2 occours
-exiting JOSM
-javaw.exe is still running after one-two minutes, found out while try to remove validator-plugin-file manuell (windows blocking file renaming because it got still a handle)

I assume that the deactivation of the plugin failed and the file handle wasn't deleted probably after exiting the process doesn't terminated right.

[Bürste]

First errormessage

[Bürste]

second errormessage

[Gubaer]

(In [2817]) fixed #3063: Downloading a plugin yields 3 dialogs at the same time: Downloading plugin / You should restart JOSM / Plugin downloaded
fixed #3628: JOSM blocking itself updating broken plugin
fixed #4187: JOSM deleted random files from disk after start (data loss)
fixed #4199: new version - plugins update vs josm start [should be fixed. Be careful if you have two JOSM instances running. Auto-update of plugins in the second instance will fail because plugin files are locked by the first instance]
fixed #4034: JOSM should auto-download plugin list when it hasn't been downloaded before [JOSM now displays a hint]

fixed: splash screen showing again even if plugins are auto-updated
new: progress indication integrated in splash screen
new: cancelable, asynchronous download of plugins from preferences
new: cancelable, asynchronous download of plugin list from plugin download sites
new: asynchronous loading of plugin information, launch of preferences dialog accelerated
refactored: clean up, documentation of plugin management code (PluginHandler)