I debated for over a week whether to install LCC 3.1 with some of the negative reviews on Apple Discussions and here. But I bit the bullet and tried it today and it worked fine for my MX Revolution mouse.
The work around I used worked also which was installing from within the LCC 3.0 installer package and copying Expose from Utilities to Applications.
So after updating to LCC 3.1 I removed Expose from from Applications and it is working fine. All buttons functioning as they are supposed to.
Logitech Control Center
For their USB mice & keyboards.
Version: 3.1