Open TB Harmony 10.3 files into Harmony Premium 12.2 version

Hello everybody! Can I open harmony 10.3 files in the 12 version with no problem? I’m using harmony 10.3 for a long time and thinking about to upgrade to the latest version but i realize that harmony premium 12 has a .xstage extension and searching on web, a downgrade is not possible (rig opens ok but no drawing inside of it). So, if I open my files 10.3 .stage files into 12 there is a change to damage it?