I have tried but been unable to replicate the issue so far. Unfortunately this issue seems to have something to do with your particular system which is very hard to diagnose remotely. You might be able to start by bypassing the startup phase, to do this try the following:
0) Look in the folder named "E:\Users\Longom\AppData\Roaming\MathWorks\MATLAB Add-Ons\Apps" for a folder named something like "FEAToolMultiphysics" .
1) Start Matlab.
2) Enter the command in the Matlab CLI with the path found in step (0):
addpath 'E:\Users\Longom\AppData\Roaming\MathWorks\MATLAB Add-Ons\Apps\FEAToolMultiphysics'
3) Start featool with the command:
featool
If you try this please let me know if it works or not.