I used a previous version of QMC and it worked fine. I was pleased with the product so I made a donation. I uninstalled the previous version then installed the provisional beta version as recommended using the link provided in your email. From that point on I have been unable to use QMC at all. I can't input the supplied deactivation code because the current license can't be edited or deleted. Also QMC shuts down moments after launch even if there is no activity. My OS is Windows Vista Premium 32.
Please help!
