.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:

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

Mac: https://www.dropbox.com/s/lqb59h0nkyz72cd/AppStudio6.dmg
Win: https://www.dropbox.com/s/a0bk44ydgtqv72p/AppStudio6.exe

Thanks! It was throwing the students for a loss!