It sounds like your new router does not have a default configuration. If it did it would be set as a "Wisp AP" rather than a "CPE".
If the current
routerOS is probably outdated and needs to be upgraded. Follow the steps below to update to the latest routerOS v6.43.4 and you will have a functioning router set as a " Wisp AP" at the factory defaults.
1. Go to https://mikrotik.com/download
and download MIPSBE v6.43.4 . While you are there download the latest version of the Mikrotik Utility called "Winbox.exe". This is a better program to use for working with a Mikrotik than your web browser.
2. Upload the routerOS file to your "Files" directory in your router.
3. Go to "System->Reboot" and reboot your router.
4. When it comes back up go to "System->Routerboard" , click "Upgrade" and agree to to the upgrade.
5. Go to "System->Reset Configuration" and check mark "Do Not Backup" then click on "Reset Configuration" and agree to reboot and reset.
When your router comes back up it will have a factory default configuration and will be ready to use. If your Groove is set as a CPE giving out IP's in a subnet other than 192.168.88.0/24 then all you need to do is plug
it into Port 1 on your router and start using it.
You will need to put your own Network Name, Wifi
Password, Login Password and country on your router after you've verified everything is working. After you've customized it with your own personal settings go to "Files" and make a backup file. Do not encrypt the backup. Restore your backup rather than do a Reset when you want to return to known good settings.