We are using Orbeon 3.8 in a standard config with eXist database.
Is there a way tot easy upgrade the db to the new 4.1, and have the saved data (forms and data) available in the new version?
I would:
WEB-INF/exist-data
directory (where the embedded eXist stores its data) from the version 3.8 expended war to the version 4.1 expended war, start Tomcat, and see if eXist is able to process the files you copied.Also, instead of using the embedded eXist, I'd recommend that going forward you deploy eXist separately from Orbeon Forms, so you can upgrade eXist and Orbeon Forms independently from each other.