Want to uninstall

Hello,
I installed a softwere in my usb disk "usb flash security 1.3.4.1" by "kashu system design inc.". i thougt it ia an anti virus. but it is an encryption software actually and creating problem. now i want to uninstall it. but it can't be uninstalled. i tried to format my pendrive. but no result.
please help me i want to remove that software totally.
how can i do that?