What or who is FastSpring? Team FMVersion October 12, 2018 10:09 Updated FastSpring is Our authorised reseller, payment provider & subscription manager. Related articles Does fmversion.com offer a free trial? How do I locate and remove illegal bytes from my FileMaker file? Can I upgrade my account from a ‘single user subscription’ to a ‘business or enterprise’ account? Comments 0 comments Please sign in to leave a comment.