App Designer not working for 2017b

I was using the appdesigner on MATLAB 2017a. I installed 2017b and called "appdesigner" to get this error:

Can anyone advice me on how to fix this issue?

Answer 1

[Birdman]

You have to check whether the specified file by the error is in the current directory or not. If it is not, then you have to provide that file to your directory.

[Goku]

I am not sure, somehow reinstalling it last evening did the work. Thank you anyway.