Note, you will need a new GEMS 1.12.2 to download to 3.10.1. The template also changed, so you will need to download a new template, which I assume will be announced shortly. You will need to re-download to a blank floppy because the database changed. The 3.10 database should now be stable -- you won't need to re-download again in the 3.10 series. Normally the database does not change within minor releases, but the previous 3-10 releases were just for testing. 18.104.22.168 is "the real thing".
Also note with the GEMS release you will need to re-upgrade from 1.11. Again, the database changed, and again, it should now be stable so you won't have to do it again.