your best is to open the project in safe mode.
this will allow you to load vst's and keep others unloaded. this will help you eliminate if it is a vst issue.
the second thing, what is the message upon crash ?
this is critical in finding the root of your problem. next time you crash, capture a screenshot or write it down.
there also might be info in windows event that will allow you to see what is going on.
If you narrow it down to a plug in, then It could be a Kontakt library and not necessarily Kontakt itself.
I do know this, some kontakt lib's use heavy graphic / Open GL. if your not up to date on your windows updates, or graphic card updates that is a classic cause for the crash. even if its onboard graphics.
Some specs might help (Windows OS, PC specs.)