Re Send Registration Access Links

If you need to manually generate a registration link for your customer, you can do this by going to OptimizeMember > Paypal buttons (or OptimizeMember > Clickbank Buttons if you are using Clickbank) and find the "Member Registration Access Links" section.  It looks something like the screenshot below:

You can then use this section to create a new registration link for your customer for them to signup to your course or program.