thanks for the advice.
I was forced one day to this dirty trick, because we was working with different Hype versions and had no chance to upgrade (procurement takes a lot of time here). The version bump was little (from 2.5.0 to 2.5.3.) and I had never problems to provide my colleagues with the newer one.
Since my team mates waiting for an upgrade to Hype Pro the problem is going bigger since I'm working with the latest version. Meanwhile I shuttle between 3 versions of Hype and often an older file get automated opened by the latest version by mistake.
Maybe there is a way like other application doing a downgrade in the save as process like Indesign, Illustrator or Word?
Secondly I do not understand the use case of Hype Pro 3 and Hype. A mixed use in a group of people ist useless because there is no way to save a Pro document from a regular version. Can you explain a little more whats the background of this decision was? I would love to see more backward compatibility less version issues.