Note that, currently, deleting replays is restricted to GGTracker Pro subscribers (the idea being that if you care enough about GGTracker to want to delete a replay, you probably care about it enough that you should be contributing to keeping the server running). So by the same logic, mass delete should be a GGTracker Pro feature.
From @dsjoerg on August 17, 2014 20:44
A commonly requested feature.
Note that, currently, deleting replays is restricted to GGTracker Pro subscribers (the idea being that if you care enough about GGTracker to want to delete a replay, you probably care about it enough that you should be contributing to keeping the server running). So by the same logic, mass delete should be a GGTracker Pro feature.
Copied from original issue: dsjoerg/ggtracker#2