Had this happen on a user and this used:
Hold the Shift Key down and Right-click the sub-task window and select 'Restore' or 'Maximize' . The form will either open maximized or it will show the task as a small, rectangular window that you may resize or maximize as needed.
I also noted that the user folder appeared in a non-standard location so it’s possible that was at play.
I think I wound up setting the shortcut ( via properties ) to open maximized with mixed results.
Also, 2021.1 changed the location of the user’s Sage 100. I think it is now under appdata. If you have PU1 double check the list of fixes and changes.
---------------------------------
Wayne Schulz - Schulz Consulting - 860-516-8990
---------------------------------