There are two ways you can do this, firstly you could go to the main forum page (top left hand FORUM button) on the left hand vane is FORUM SPONSORS, scroll down to Tysoft click the link and follow the instructions for contacts.
Secondly you could do a member search to find the Tysoft TEF member page and leave a PM for them.
Open program. Click on new certificate (top left) Then, lets say double click on domestic electrical installation certificate. A new box opens saying 'create new cert' In the middle its says single sig or multiple sig. Highlight the round box for which one you want