Are there legal issues if a file created for profit was created in a professional version of Adobe software, but then edited in a student version?
Not that i know of no. You can however be done for illegal software downloading if thats what you mean.
No. I mean, say I have a legally purchased version Photoshop at home. I acquire a job and begin work on it on that version. Then, I take the file to my school and continue to edit it there. What are the legalities there?