UOG: Demise

im coming back from a long gap.

I used to run UOSteam, but i've had no success trying it.

I wanna know if, is it able to use UOS or only razor?

You can use any assistant/launcher that you are able to get going.
Since the login URL changed, you have to manually adapt it in UOS. Try login.uogdemise.com , port is the same.