How to delete com.squirrels.airparrot-2.sfl?

I’d follow the published sequence for removing AirParrot 2, as that appears to be the goal here:

http://help.airsquirrels.com/support/solutions/articles/1000185639-how-do-i-uninstall-airparrot-2-from-my-mac-

If that’s not working—let us know—and you can’t delete the specifed file through Finder, you may have to use the command line.

Have a complete and current external backup. Maybe two. Disconnect the backups temporarily.

Launch Terminal.app, type the following in (but do not hit return!) (unquoted!) string “sudo rm “ with that teailing space, then drag the file to the command line, and that should drag the dile path and name into the command line. This is a request to delete a file as the root user.). Press return. You’ll need to enter an admin password for the sudo. The file should now be gone.

But I’d again encourage following the AirParrot 2 documentation for removal, as a piecemeal deletion of files may well lead to some misbehavior.

Have complete and current backups. Your data is very difficult to recreate, if there are no backups.

If you were following the AirParrot 2 removal sequence, then I’d suggest asking the AirParrot 2 support folks for assistance.

If you’re deleting files without the assistance of the removal guide, then—and deleting this file may not produce the desired outcome—use the sudo rm command to remove the file.

If it's the latter path you’re following here, then I’d consider reinstalling AirParrot 2 as that hopefully reproduces the expected software configuration, and resolves any dangling bits of installed software from the prefious install, and I’d then follow the AirParrot 2 removal sequence.

Removing a software package incompletely or incorrectly can unfortunately sometimes cause macOS to become unstable. Have backups.