Okay just bitten the bullet and installed version 1.2.7 and hit two problems.
1) The product would not install into vB 3.7.2 PL2 until I adjusted the 'maxversion' to 3.7.3.
2) I have at the moment 33,378 users registered and the Mod decided that 29,727 users were inactive. This is with setting the inactive period to 90 days. That seems way too high a ratio?
See attached images for examples.
for the moment I've disabled the Mod until you can check that the coding is correct. I hate to think our forum is that quiet!
In case you need it my settings are also attached. (Note bounce usergroup set to 0 to hopefully disable the feature until I know we are working okay)