So sorry to hear that you are getting the “You do not have permission” error, this is not a DugiGuide related issue, however a simple google search will result with this video that may help with resolving the permissions issues
As far as manual install, you an try football’s instructions https://www.dugiguides.com/discussions/#/discussion/15/guide-manual-installation-guide-by-football
As far as ending ones sub, that’s entirely up to you.
It seems the auto installer has issues reported here https://www.dugiguides.com/discussions/#/discussion/14/installer-not-working