You dont have to uninstall, only update the game, it will create you a new 0.9.7 folder without any mods inside, acts like clean WoT 9.7.
Then you have manualy remove all other files and folders in res_mods, leave 9.7 alone.
Remember there is no Aslains modpack for 9.7 yet, you have to play vanilla game or use other modpack until I update mine.