Can I open Toon Boom Studio 5.0 project in Version 4.0?

Retired Products Toon Boom Studio General Discussion
1

Can I open Toon Boom Studio 5.0 project in Version 4.0? Is this downward compatible?

2

As far as I know, Studio is only forward compatible…?

Regards
Nolan

3

Ive tried, and it doesn’t work. 5 is compatible with 4 files, but 4 is not with 5.