Reinstalling Groupshare 2017

We need to reinstall Groupshare. Do we have to download every TM manually, perform the install, then recreate all containers, users, etc., then create all new empty TMs and import the TMs from the manually downloaded ones? A few months ago, we had to upgrade our GS server, so we installed it anew and had to do he steps mentioned here. Simply connecting GS to the existing database with all the containers, TMs, etc. didn't seem to work. When we would log in to GS, we couldn't see any of it, so we had to create them all again manually and import the backed up TMs. It's a LOT of tedious work that we'd like to avoid if possible.