Downloaded the portable version here: wisecleaner.com/download.html
The main 2 differences between the portable and installed GOTD version are 1) the installed version adds a folder to Users\ [UserName]\ AppData\ Roaming\, while the portable version puts the contents of that folder in the program's main folder, and 2), the installed version adds a registry key with the activation data for the Pro version. Both versions add several registry entries for file associations, the Explorer context menu, and a service -- the installed version also adds an uninstall key.