Sometime the invite e-mail is overlooked or it may have ended up in your spam box.
You can always go to www.pledgemaster.games and enter the e-mail address that you use for your Kickstarter account. It is very important that you use the same e-mail as your Kickstarter account. If you do not, it will create a new account that does not have any of the funds you may have paid in through Kickstarter.
Once you have entered your e-mail you will be prompted to create a password. You will then be able to see any of our Kickstarter campaigns you have pledged too, and any of our Kickstarter campaigns that are available for late backing.