and please tell me how to clear cache in this downloadable client.coz the graphic options does not appear in the settings in the game in my Computer.....Thanks

I recently downloaded tanki online in my computer Windows 10 Pro...you see that i had already posted something about the language changing and it became nice in the new update.....but I have a problem now,..When I go into a battle, I play for a few seconds and then the screen get strucked but the sound will be running. I hope this a graphic problem. This happens especcially to me in tribute map because today's last daily mission was to earn exp in tribute map and the reward was premium account for 3 hrs....plz help me!!!!! I have not completed this mission yet....plz help me!!!!!!! Nickname : nagarjun-tanki Rank : First Sergeant