.project extension instead of .nsx

I had to re-download appStudio onto my PC. Now it saves all files with the extension .project instead of .nsx. How can I fix this?

That’s part of AppStudio 7. Here’s some more info:
https://blog.nsbasic.com/2018/10/as7-new-multifile-project-format/

If you’re not ready upgrade, here’s how to get AppStudio 6 back:

Mac: Dropbox - AppStudio6.dmg - Simplify your life
Win: Dropbox - AppStudio6.exe - Simplify your life

Thanks! It was throwing the students for a loss!