both times I have upgraded the plugin I have had SQL errors, today when upgrading to 1.1.3 I got this in my admin area.
WordPress database error: [Multiple primary key defined]
ALTER TABLE edited_rg_form ADD PRIMARY KEY (id)
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FOREIGN KEY (form_id)' at line 1]
ALTER TABLE edited_rg_form_meta ADD COLUMN FOREIGN KEY (form_id)
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'REFERENCES edited_rg_form(id) ON UPDATE CASCADE ON DELETE CASCADE' at line 1]