I have made changes in the latest beta that affect how the about dialog handles a number of events after the continue button is pressed.
This has the potential to either 1) resolve your issue, or 2) make the issue worse for everyone else :-]
Tested here under Windows 10 and XP and am unable to reproduce any issues with either the beta or previous versions.
Please let me know how it works out for you.
Sadly, it still crashes:
WARP usually means the thing is running the software rasterizer; either because the application is flagged to run as such (which is usually a developer-only option by running dxcpl.exe and entering it in a list) or because no display adapter is active, so the whole system is running using the Microsoft Basic Display Adapter.
Have you tried any of those to see if you can reproduce the crash?
Also @OP: are your GPU drivers up2date and working?
I use a 7-year old laptop. It has both Intel HD4000 (last updated in may) and Nvidia Geoforce GTX 675M which is sadly no longer supported and last updated last year. I tried running mIRC on both and it still crashes.