MotorSphere

Hello, I've recently purchased the PMDG 777 and I am attempting a fix for a previously mentioned problem on this forum, regarding "phugoid" type flight behavior while the aircraft is on autopilot. I previously uninstalled and re-installed the 777 due to this, but the behavior came back after a few days. Additionally, my problem with "phugoid" behavior also seems more severe than some previously addressed concerns, my aircraft doesn't just deviate in altitude 1000 feet or so, but literally will dive into the ground. So, on this second attempt to uninstall the 777 and fix this, I noticed something rather bizarre. I do not have the option to uninstall the 777 in the control panel anymore, despite it being there previously. I would normally just attempt to delete it manually, but I am unsure if I would actually delete everything I need to and if it would mess up a re-installation of the 777. Any help on these matters would be much appreciated, thank you.