I installed V10.0.3530 on my new computer and I moved the database.
When I open em Client it says: This version is newer than your current license permits.
I would suggest to use the “built in backup and restore” process as per the thread post link below rather than manually transferring the database when moving eM Client to new computer.
Now if you have already done that, then could be something went wrong when you restored the backup, in which case on the new computer “uninstall eM Client and delete the database” and then do the backup & restore process again.
See the following thread on the process.