Error Message Managing Files

I tried opening an existing project file through Paquet Builder and it never opened. I acted like it was thinking for several minutes and would not let me exit. I had to use Task Manager to get out of it.

I then tried to open the project file by double-clicking the file and Paquet Builder opened after a short pause. After opening, I clicked on the Manage files to compress button and received an error message.

When I click OK, the box goes away, but hangs up and I cannot do anything in that box or get out of it. I again have to use Task Manager to exit out of the program completely.
Please let me know what I need to do.

Please upgrade to the last Paquet Builder version available at
This will fix this issue that occurs on the Windows 10 May 2020 Update.