Windows 10?

Is version 6.3.7.2 compatible with Windows 10? Is it safe to upgrade OS, or should I keep my powder dry for a little longer?
I've played around with Igor under Win10 Pro for a few hours and did not find any big problems.
I installed V 6.03 on a win 10 desktop last week and it worked but as of today, when I click on Patchers Power tools: load Pulse files Igor crashes. I will stay with Win 7.