A question on 6.1.12
Can it coexist on same DB/network with other workstations running 6.0.10?
Can I try it out on my workstation without upgrading all?
Not quite that easy. At a minimum, you'll need to upgrade the DB {AFTER a SOLID backup], run the tuner, and run the installer on that machine.
If you are not liking that, you have to uninstall/restart/reinstall/restore.