Computer crashing when using Debut with gotowebinar

[Mageddie]

After having used Debut video capture software to record from gotowebinar for years with no challenge, I've recently been having crashes (bright blue screen with white print > sudden death).
Dr Google somewhere suggested reason might be needing upgrade of Debut. Purchase x 2 latest version makes no difference: crashing persists.
Have emailed to NCH Software but responses are always slow in coming.
Recordings are essential to team support in business, so am rather desperate to have a fix.
Can anyone help please?
P.S. New user to this forum - and not been a regular forum user much at all. So thanks for your patience!!