It is a known issue with FM14 on Windows 10 build 1511 onwards, see this thread:
Whilst not a way to fix it there may be something you can do as a temporary measure to retain your sanity.
From my findings (P8 of the above) the crashing occurs when the script listing contain a scroll bar.
So, what you could do is move your scripts into a folder (or multiple) and collapse the folders so there is sufficient 'empty' space in the left hand script list. That sounds odd I know, but if you check out my post you will see its relevant and confirmed by FMI.
Thank you. It is really appreciate. i'll take a look at this.
The crashing when renaming a script or script folder has been addressed with FileMaker Pro 14.0.5.