You need to check your motor mounts and the alignment of clutches,  on a snowmobile, atv, or side x side there is very little chance of a belt lasting if the clutch has something wrong with the alignment.   The belts should last at least 2500 miles.  The worst thing to do is slip the primary clutch at take-off, like when trying to pull something.  Always make quick deliberate accelerations when pulling something really heavy as this makes the clutch grab and go without slipping and hour glassing the belt.  Once the belt has a burned spot you can almost count the days till it will detonate. Also make sure to check for wrapped cords from the belt in the clutch and on the engine PTO as they will eat out a engine seal and cause a list of way more expensive repairs.  There is no way the clutch bottons should have shown any kind of wear at all with that few of miles on it.  More likely that it was assembled wrong and the were shimmed too loose,  or even more likely too tight, not allowing the clutch to engage easily, thus wrecking "your" really expensive belt that isn't under warranty.  After readingyour post again I see it said 45 hrs, I thought it was 45 miles.  You could have quite a few miles at 45 hrs.