I upgraded to version 6.1.7.3
Why?
Did you receive a 702 error in a previous version?  Otherwise, there was no reason to install 6.1.7.3.
Did you delete all your existing content from your task queue as the changelog told you to do?  Probably not, because hardly anyone reads anything around here.  They get on the forum and write a complaint, come back a day later to see if anyone replied to their complaint, and then they disappear for a while until they show up again to make another complaint.  It's not unusual for this forum having 3 or 4 threads, all on the same subject, because no one is reading anyone else's thread.
And God forbid anyone reads the big banner at the top of the forum that tells everyone that things are not going to be fixed until the DRM problem is fixed.  Forget about any updates other than 6.1.6.1 or 6.1.6.7.  All the other updates are there just so that you will forget that the Developer doesn't know a thing about how to fix a DRM key problem.  You're falling for the old sleight of hand trick.
Lemmings.