like what

I think he means not knowing how to clear his cache & stuff.

Anyway, to reload the game completely (in Internet Explorer anyway), oen the game window & press Ctrl+F5. Or, to empty the whole cache, go to:

['Tools' menu] > [Internet Options...] > ['General' tab] > ['Temporary Internet files' box] > [Delete files...]

Tick "Delete all offline content", & press [OK]. It may take a few mins. (NB: This is just for Internet Explorer as well.)

or u could just download the d.l version..