I am just starting to use openEmr again, after not using it for a few years.
is there a way (that is worth the effort) to migrate data from openEmr 3.2 to 4.2?
I have backup files from then but would think that they would not be compatible.
It is still possible to upgrade from 3.2 slowly up to 4.2 with the patches available. Follow the WIKI instructions for upgrading.
Sometimes it is also done 3.2 tot 4.2 direct, but this can give rise to problems with some tables etc. If upgrading you should be in the same Windows or Linux/Ubuntu versions.
Installing with a backup from 3.2 direct into 4.2 is asking for problems. (Developers, please correct me if I am wrong in this advise.)