By default, the InnoSetup installer asks the end user to enter the machine's administrator password in order to install the application (since, in this case, installation requires write-access to %HomeDrive%\Program Files). Arguably, this is probably unnecessary, however, as Gridsync/Tahoe-LAFS does not and should not require augmented privileges to run. Accordingly, the user should be able to install the application in a directory that's local to the current user (e.g., in %AppData%\Local\Gridsync), if not by default, then as a choice during installation.