Yes, your IP has changed. Not because Tommy's IP changed but because you've been moved to the Morty server. 🎉
Here's the news post announcing that Morty was ready to start accepting the first batch of accounts: https://helionet.org/index/topic/63011-morty-beta/
You should have received 2 emails about the account move. If you didn't receive our emails, please make sure you have a valid contact email address listed on your profile inside Plesk. I'd also recommend you use the same email address on your forum account, since this is how we verify account owner identity to make domain changes or account resets that are requested on the forum.
Since you've already found the new IP to use (inside Plesk > Websites & Domains > [domain name] > bottom of the page), please also make sure to use `morty.heliohost.org` as the server name.