Hi @robertmenard63, no worries at all, we're here to help.
It sounds like you're re-installing through the mobile app, what it wants it the username / password / and SSH Port for your Pi so it can access it to run the installer. SSH stands for 'secure shell', which is just a way of communicating securely (encrypted) with your Pi.
On a default pi, the SSH Port is 22. ( and the default username is pi, and password is raspberry )
If that doesn't work, just reply here, and I can walk you through the alternate method of installing (which is really just logging into your pi manually to do what the mobile app should be doing automatically).