[BUG]: TT hangs when clicking "Change Portrait Image"

[Azhrei]

Describe the bug
Report from a Discord user (link to the Discord post is here):

[...] when clicking "Change Portrait Image" (or background image) on Windows 10, nothing happens. It used to bring up an open file dialog, but now it does nothing. I tried updating to 2.2.1 with the msi, and it still does nothing.

To Reproduce
The user says they moved a directory that TT used to use. (Apparently, the app is looking for the directory at startup and hanging when it no longer exists, but that's just a WAG on my part.)

Expected behavior
If there's a problem, an error message should appear.

TokenTool Info

• Version: 2.2.1 (latest)
• Install: Apparently a new install using the .msi approach

Desktop (please complete the following information):

• OS: Windows
• Version 10

Additional context
Phergus posted a solution on Discord that involved opening the registry key

Computer\HKEY_CURRENT_USER\SOFTWARE\JavaSoft\Prefs\net\rptools\tokentool\client

and deleting these two entries:

last/Background/Image/File
last/Portrait/Image/File