I already uninstalled Tuxera from Mac OS 10.5.8 but everytime I start up my computer an error message appears like the one in the picture attached.

I have an external hard drive connected via USB for continuous Backup of my files.

When I remove the external hard drive no message appears. The problem comes from the external hard drive and not from the computer. I tried to format the hard drive and did a new backup. The error message still appears.

It is annoying to see this message everytime I start up my computer. How to delete this message?

Thank you