I bought multiplicity 1.2 a week or so ago and there seems to be a v1.3 update around... I have impulse installed and it doesnt let me upgrade to 1.3.

Does buying 1.2 give me the right to spend the same amount again to upgrade to v1.3?

I say this because I am noticing some of the bugs that are mentioned here. 

Currently my favorite one is when I dual-wield an instances of 2 computer games across 2 Wido$ XP computer$, I notice that Multiplicity locks up the DirectX instance of the computer game  on the primary computer.

Not that I'm ungrateful that I have 2 mintues of bliss being able to control 2 computers at 1 time using 1 keyboard and mouse, however $40 for the pleasure, I'd rather use VNC or Synergy... then I could spend that $40 on another mouse and keyboard and have something physical to throw across the room instead of writing an angry post here.

Any useful advice happily accepted