HSTracker now use a new system to improve your tracking. It allows HSTracker to auto-import decks from Hearthstone, detect ranks, game modes, ... You will be asked to authorize HSTracker to read the memory of Hearthstone. There's no other modification done to your system. Please note that this version will delete your statistics, this is due to a big modification of the statistic system.

https://github.com/HearthSim/HSTracker/blob/master/versions.markdown