Add and Remove DEM Worker

Hi

just installed VCAC 5.2 on one server and would like 2 other DEM Worker on different servers.

i installed the DEM Worker (with different names) and they appear as offline. is there anything i should do to the dem worker servers that i missed? (like copying the certificates maybe?)

and on the same note, now that i have a few non-working DEM workers on the VCAC console, how do i remove them?

thanks