Problem with Arthemia Premium

i just bought Arthemia pro version,, i like it very much but have some problems with it ,,and support engineers r not helping me out,,,my problem is the size of thumbnails is 80*80 by default but i want to use 155*155 ,,,,
second problem is i want my post layout style just like https://www.allinknowl.com/ who is also using arthemia pro,,i think have done some tweaks i just wanna make my site look like him my url is https://www.myhut.co.cc plsssssssssss help