I always recommend you simply rebuild them in the current version. The amount of time it takes to do this is minimal considering the time you can lose by attempting to troubleshoot some weird behaviour which is due to corrupt user settings. This applies to all NLEs: Avid, Resolve, Premiere etc.
I know this advice annoys some people; they expect it should just work. But developers are always adding new features and things can break if you are using settings created in a previous version. Save yourself the headache, just recreate them, it takes 5mins.