Sorry it is such a pain. I did warn it was a hard mod to install.
Ideally you would undo your database changes and remove all the code changes too from 1.0.13. You don't have to remove the cron jobs, but you may need to edit them later. As far as going in reverse, try starting at the bottom of install.txt in 1.0.13 and going backwards.
To remove the tables, use a utility like phpMyAdmin. The statements are something like this:
Code: Select all
drop table phpbb_mod_subscriptions;
drop table phpbb_mod_subscribed_forums;