In SIMS when you run a patch it updates a table in the DB.
When you run it again it should tell you that it has already been applied, unless it's one of the few that can be applied repeatedly.
I'm pretty sure it's the same for FMS.
So, you could just try to run it and usually it reports and says this patch - DB update 3.6-3.7 can be applied.
A safer way is to look at that table.
I have an SQL script that reports on the table in SIMS. Never needed it for FMS.