The TC purchase window only appears when you click on the tiny 16x16px button. Also notice that in 2009-2010 there was a way bigger button that was allowing you to buy boosters.

Also it was said quite a lot of times that no changes that will change the Toribash gameplay are to be implemented. Different default point system will. Some changes were made to point system in the latest version, I guess even snake made some mods using those changes.