I've had several crashes in PhotoPaint today, to the point where I had to abandon X7 and go back to using X6 (which worked like a dream).
I was having to crop several large scanned illustrations (all about 4,000x3,000px RGB 24bit TIFs), all with very ragged areas, but all on white backgrounds. This was my method:
This was usually when I had a crash although the program slowed dramatically after clicking with the Mask tool in the white background. Either the program froze and I had to manually close the program or once the crash was caught by Win7 which sent an error report to MS and closed the program automatically.
The same method in X6 worked perfectly even with several of these large images open at the same time. X7 couldn't even cope with only one image open.
I'm currently working away from my office on a Win7 32bit laptop with 3GB RAM.
I've had this same problem with multiple iterations of Corel Suites on various desktop PCs running different OS's over the decades. I'm currently on Win-10 64-bit and I've twice reinstalled the entire Corel 2017 Suite and ensured I even avoided making changes to the workspace. But the same problem happens again and again. Reinstalling isn't the solution. I sent a bunch of OS logs and other data to a Corel Support Tech but they couldn't resolve the issue, either. And they refuse to refund my purchase price. Sad that this is such a common issue but Corel just refuses to resolve it or, at least, refund customer's money.