[CLIENT] Swipe to older version after crash

After dodging one game I tried to re-open the client and suddenly it stuck at pre launch of client stuck at League of legends logo, few moment later I've stoped the game from processor and every thing was ok, I did re-open the client and boom a message says: "we have restored this installation to an older version of league of legends, now we'll try to patch it up to the latest version."

I will not re patch this game once again cause I waited about 7h to get the patch done so... please any way to fix this and it happens for me every time after new patch!!

Using windows 8.1 and I have bad internet speed 100Ko/s it take ages to get the patch done