PL/SQL Developer v11.0.6 (64-bit)
Windows 7 Professional (64-bit) on Core i7-3520M@2.9GHz, 16 GB RAM
NVIDIA Quadro K2000M v25.21.14.2531 (425.31, 10Apr2019)
Three monitors: Lenovo Laptop LCD @1920x1080, ASUS PA238 @2560x1440 (primary), Samsung T240 @1920x1200
Recently, PL/SQL Developer has started redisplaying dialog boxes that were closed. Once reopened, they can't be closed - you can minimize them, but the okay, cancel, and upper-right 'x' buttons do nothing. Examples are the Crash Recovery window that is displayed at startup; multiple Template Wizard dialogs; and the Find & Replace dialog window. To get rid of them permanently, I have to kill PL/SQL Dev in task manager and re-open. The dialogs will appear and close correctly for a little while, but then for no reason I can determine, all of the dialogs that have been closed up to that point are suddenly redisplayed and cannot be closed again.
This is unrelated to any PL/SQL Developer upgrade (11.0.6 was released in April 2016), and there have been no Windows updates since 17May2018 (corporate laptop with an intranet update server - most users have moved to Windows 10)... I'm not sure when the issue first started, but I don't believe it is related to these updates. I have installed other software that may have included newer versions of common controls.
I have a screenshot, but don't see any way to attach it to this thread
Any idea why this is happening?