Older c2d files not able to open in build 836

I downloaded build 836 and now the files I’ve been creating since I started are unable to open in build 836. Is there a big change in c2d files that the new build won’t recognize?

Yes, see:

https://carbide3d.com/blog/create-v8/

Create V6 files do not load into V8

See:

I have build 815 on my shop computer and they will open in that build. How can I revert back to 815 on my home computer?

Reinstall the unsupported version from the installer on the shop computer.

do you mean install 836 on my shop computer? Then all my files that Iv’e created will not work

No, copy the installer for 815 from the shop computer to the home computer, run it on the home computer to install 815.

OK, Gotcha. I still have the application file for 815.Thanks

Update: Won’t open on shop computer or home computer. I guess I’ll have to go back to version 7
Where would I go to get the version 7 software?

Build 778 is available at:

https://carbide3d.com/downloads

Thank you for your time.