According to OpenLedger, you should be able to trade your OPEN.MUSE for OPEN.MUSEOL soon.
I hope so.
Also, yes the decimal point was move by 2 spaces. So not a single satoshi was lost. The economic model between old MUSE and new MUSE are different. The rational with the decimal change was mostly for better UX.
Trading with 4-5 zeros could be annoying and also, human brains have a better grasp at Millions over Billions. All the top coins on CMC also where in the 20 million range.
Ah! just because of money then, not a real reason. OK.