Matlab doesn't open (it's installed and activated)

I'm on a Windows 10 machine and Matlab 2020b.

I had it installed and activated then suddenly it stopped working. When I try to open Matlab, it shows up in my Task Manager but the software just doesn't open.

Can someone help me please?

I have tried the solution below but do not have this directory on my system:

Please delete the following folders (previous prefdir)

• C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018a
• C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018a_licenses
• C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018b
• C:\Users\YOUR_USER_NAME\AppData\Roaming\MathWorks\MATLAB\R2018b_licenses

Thank you!

Answer 1

[Jan]

If you are running Matlab 2020b, the folder is not called "R2018a", but "R2020b". Insert this in the Windows Explorer's address line:

%APPDATA%\MathWorks\MATLAB\R2020b

Rename the folder instead of deleting it. If this is not the solution, undo the changes.

Remember, that the AppData folder is hidden usually.