I too have Balance with 6.5.3 (which I upgraded from Essentials) and after 3-4 weeks of using it without issues, I've started getting this message come up when I try to open it. Reason then closes due to the error.
The strange thing is, if I leave it for about 5 minutes (for example whilst I'm on here reading about this problem...) then try again, it tends to work even though I've done nothing. Very odd. And hey presto- I've just tried it, and it's opened without any problem.
I'm interested to see what reply you get from Propellerheads. If you get a solution, please post it on here!
Last edited by TheDarkHorse; 2013-02-22 at 00:42.