I just sent some notifications out as we had the Mac and Linux versions still going through tests and such. I'll make a post in the subforum regarding the new version in a just a few minutes :)
Does this mean that I should get an update flag?
You should, yes.
You should see this on your shelf:
Patch 2,2 (hotfix for patch 2.1)
for your Windows version, if you use the Windows version :)