You may not uninstall AirDroid as you usually do because you've enabled Find Phone feature. Please follow the guide below to uninstall.
There are two ways to uninstall AirDroid:
1. On your device, go to Settings > Security > Device administrator, find AirDroid and uncheck the box next to it. Tap Deactivate and then OK to confirm. Then you can uninstall AirDroid just like you uninstall any other apps.
2. Open AirDroid on your phone, tap Uninstall > Enter your AirDroid account password > tap Uninstall and then OK to confirm. Then AirDroid will be uninstalled.
Tip: If you forgot the password, you can reset it here: https://www.airdroid.com/en/resendPassword.html
Right click on AirDroid icon shortcut > Properties > select Open File Location:
Double click uninst.exe to uninstall.
Go to Applications, right click on AirDroid and select Move to Trash: