Calc crashes when I enter simple formula, e.g., "=a2+25"

For some strange reason, Calc is crashing when I enter just a simple formula such as “=a2+25”. LO version 5.1.4.2, Windows 7, SP1. Thanks in advance.

Reset the user profile (rename the user folder in C:\users[user name]\app data\Roaming\LibreOffice\4 with Libre not running) or, if that’s not good enough, do a repair install. Note that re-installing Libre won’t reset the user profile, so if that’s causing the problem, re-installing won’t help.

I’m sorry, but I did not understand your solution. I could not locate that directory. I see LibreOffice 5 in C:\Program Files (x86).

See https://wiki.documentfoundation.org/UserProfile#User_profile_location