'Malwarebytes has stopped working' (Free & Premium versions)

[emcee47]

Have been using Malwarebytes free version for years and have been thoroughly satisfied with it.
However, recently I have been getting an error message on trying to start a scan: 'Malwarebytes has stopped working - Windows will close the program and notify you if we find a solution...'
After days of getting this message repeated, I assumed it may be connected to my new AV (Bit Defender) clashing with the free version.
So...valuing Malwarebytes as highly as I do, I bit the bullet and ordered the Premium version. You know what's coming next:- the problem is still there!!!
I have tried deactivating Bit Defender whilst Malwarebytes attempts to scan but no change.
Help please!

[John L. Galt]

Hi,emcee47, and

 

Are you using BD free or premium?

 

Have you added exceptions for BitDefender executable(s) into MBAM?