How are you starting TotalFinder at system startup?

On macOS 12.5.x here and it seems that TotalFinder will not start up at system start and stay running. If I pop it into Users & Groups → username → Login Items it simply disappears after several seconds each time.

I would like to be sure it starts automatically on reboot, but I just can’t seem to get it to do so anymore.

Anyone else have a similar problem and find a solution?