I'd like to upgrade to the latest version to take advantage of a few bugfixes (and see if the occasional crashes stop

However the composition crashed 3.3.2 when I try to load it.
Could someone remind me is this because there is some incompatibility/change in the file format or is it for some other reason which maybe a crash report could help identify?
I have a vague memory that something changed somewhere along the line but not sure what it was,
Thanks