Hey there, is it possible you didn't unzip the folder first? GB studio can't read the project data while everything is zipped.
EDIT: I'll reupload a zipped course file that doesnt additionally zip the project files within it to reduce confusion.
Viewing post in LBaP! v2.0 (GBS 4.2.1 Update) comments
Hmm, that is concerning. I haven't heard about this issue from anyone else. Would you mind contacting me via discord so I can troubleshoot with you (username: gumpyfunction).
EDIT: I've double checked with another user and their project files do not show a blank project in the free version. Still contact me and I'll attempt to help you solve the issue.