This issue has come up enough and I decided to help resolve it by modifying the installer. It now detects if an interval program is running on the same machine. If so, it auto fills in the IP:port and password (default: opendoor). All you have to do now is enter a username / password.
To help delineate, when an interval program is found the OS IP/password renames to Interval Program (detected) and collapses. It’s header turns black (similar to advanced configuration) instead of the normal blue.
This combined with the new auto detection for config and log file location the install process should be a lot easier for Raspberry Pi users, hopefully!