Awful windows store taskbar icons


Does anybody know why windows store taskbar icons are different to those from the same apps downloaded from the web?

Whatsapp desktop and Tweeten for example when downloaded from the we b have much nicer icons than when downloaded from the store. Store app icons are really small and in a little square, its ugly and really irritating.

Does anybody know how to fix this, perhaps mehedi as developer of the tweeten app could comment as to why they are differnt?