Re-downloading a newer version of unity with older projects

Hello. Some time ago, my computer broke. I recently received a new one but my programs were all gone. I had all of my documents and unity projects left from the 3.x versions. My question is, If I download a 4.X version of unity with projects from 3.x versions,Would there be a problem?

First you should create a backup of all your projects :wink:

Second it’s possible to install any version of Unity as long as you have the installer.

Finally, yes there might be some problems. There are always things that get deprecated in newer versions. Also the newer scene / asset format is no longer backward compatible. So once you upgraded your project you can’t go back that easy.

So think twice. With a backup you’re always on the safe side :wink: