Please check your system whether has any pending windows updates or not?, Sometimes becasue of the update failure or pending updates will stop or affect the .Net Framework. So better update your operating system and then try to do the same.
If still you are facing the issue, please write a mail to firstname.lastname@example.org with the complete error report. so that we will try to troubleshoot the same as soon as possible.
You can also send the complete error report to troubleshoot the issue. Please follow the detailed instructions to take the complete error report: https://www.axcrypt.net/blog/send-complete-error-report/ .