It was reported to me yesterday, in conjunction with a new development not yet publicly available, that if you use the ‘X’ window icon to close the application window, and you have the option ‘Close to Tray’ set then when you try to restore the application, it appears blank.
After some testing of my own, I can confirm that this exists in ALL previous versions of the application, not just the development version.
The issue has now been fixed, and an update will be issued in the next day or so, subject to Beta testing.
In the meantime, you don’t need to click on the ‘X’ icon to close to tray. Simply use the ‘minimize’ icon and you’ll get the same effect.