Hi, Guillermo.
Appreciate the quick response on this. While I reviewed the compatibility pdf, I haven’t seen this page before.
That said, I would respectfully submit that this is an issue in need of a change. It’s one thing to open a feature limited version of a program and have those features be hidden. It’s another thing entirely to have a project created in the full version lose functionality because of a save in a limited version. That amounts to data loss, which is among the greatest sins in software development (I make a living as a programmer, which is how this sin got pounded into my head 
).
While I consider data loss to be a bug, since this is stated functionality my request to fix this would be viewed by the developers as an enhancement request. Therefore, if you could submit it to them in that manner I would be most grateful, as this issue means I’m always one accidental save away from project corruption.
Thanks!