Re: message on startup 'Sonarplt has stopped working'
I have had the identical problem, only instead on a new CPU with Win 10 and Sonar X3 Producer. It will crash immediately upon attempting to load, and installing the program with primary functions alone (minus plugins) has not mitigated this issue.
I have completely (regedit, etc.) uninstalled and reinstalled about 6 times so far. I've extracted the files and placed them all in a folder to load the install .exe directly. I've run it in as administrator, I've run it in safe mode. I've applied the updates, I've prayed to unholy gods. It will not run.
I made the mistake of purchasing and registering Sonar Producer X3 instead of Sonar Platinum, yes.
There were no warnings on the box or the disc sleeves stating X3 would be incompatible with Win 10 64bit. I know others have gotten to work using several methods of chicanery, but these methods have not helped me. At this point I'm hoping Cakewalk will do the right thing, which is to release this license and allow me to pay the difference of $150 for a Platinum download. I will attempt to call customer service tomorrow, but from what I've read here on the forum, chances are slim to none that I'll reach someone.
I'd really like to begin writing music again, as it's one of the few things in my life that brings me joy. I hope the OP and I see a brighter day very soon.