Hey Scott,
I had the same problem as you. I don't understand why Rivet suddenly
needed to run in the dock when previously it would run solely in the
menubar. I don't agree with TLAF if that was an intentional change
because I refuse to run a daemon in the launcher dock when it's
unnecessary. This needs to be either an option that you can set in the
preferences, or reverted back to its original method of menubar only.
I reverted to version 2.6.5 and turned off updates until this can be
resolved. I haven't seen anyone else complain about this yet myself,
but I did send an email to their support team to the effect that I
won't be updating my software until that is fixed.
I don't like having to leave updates off if there are bug fixes in the
future, but it's too annoying to me to have that running in the dock
when it shouldn't be necessary.