Short answer: you have to re-create the files.
Long answer: contact your VAR and ask for help. There is no guarantee that they will be able to persuade SolidWorks to help, but there is always a chance if you have a compelling case.
Maybe obvious, but I am pretty sure you can export dumb solids from the student version. This gets you part of the way there (RFQ / prototypes / guide for re-creation) And you can get a long way with manipulating the imported geom w/ solids and cuts and move faces and splits and deletes... etc... Usually a PITA, but if you're only looking at minor tweaks for a prototype development, it could save a bunch of work.
If you do ask your VAR for help, please keep us updated as to the outcome. I have been curious about that myself.