Running project on mac that was created on a pc

I copied the .appstudio folder from my PC to my imac.

When I try to run the project contained in the .appstudio folder on my imac I get an error stating that the .nsx file is missing.

Are you running the same version of AppStudio on both machines?

Does it make a difference if you use “Open Older Project”?

Had to use “Open Older Project” even though both machines had the same version. Tnx.