SourceTree really slow on windows 10 with antivirus on

I've been using SourceTree for a while and never had this problem, but the past 2 days (when I updated the software from `1.9.x` to `1.10.23.1`) I couldn't use it because it was very slowly! Each click action took me 10s+ to process. After 2 days trying different solutions,, for example:

• Tried this: http://stackoverflow.com/questions/28105472/sourcetree-very-slow-with-many-repositories;
• Tried to change to beta version: Beta `2.0.12-beta-001`;
• Reinstalled Sourcetree (both 1.10 and Beta);
• Reinstalled Git (to the lastest version);

But what really solved my problem was disabling the Antivirus (mine is avast). Before 1.10 I used to use SourceTree with antivirus on everything worked fine. But since I updated, it's way too slow.

Don't know if this is actually the problem, but since I disabled it, I had no more problems. Have been using it the whole day and it's normal.

By the way, since the start of the problem, even with just 1 and a new repository just for test, it was slow. So it had nothing to do with huge files, etc...

Note: Even when I tried to specify the path to my files to exclude from the antivirus, it had no effect, it was too slow. Only completely disabling the antivirus solve the problem.