Create a World Tool

hello. i originally made a world with the caw tool, uploaded it and still use it, works fine. i have had this world for a couple years now. however this is before i got pretty good at the CAW and now that i have a better understanding of it, i want to create another world. however, i cant upload it!!! so i have deleted caw, and reinstalled it. do i need to update anything?? people talk aboat ddcache files and things of that nature.. all way over my head. please help, i love caw and want to get at least one more in!! thanks!