There are two methods to reset your own password depending on if you remember your current password or not.
If you cannot remember your current password you can reset it by click a link in the iPad application. Start PeriopSim and go to the "Login to Existing Account". Click the link under the Login area and enter the email address that was used to create your account.
Alternatively you can go to the Accounts Login page at the following URL: https://accounts.periopsim.com/
Login in with your password if you wish to simply change it. Or use the Forgot your password? link to reset your password.