Really strange - .dwg files open the installer

[CToss 0]

Hello,

One of our end users frequently receives .dwg files for floor plans.

Recently a weird issue has come up where when they click on the .dwg file, instead of opening Nitro it opens a nitro installer package? This even happened after I uninstalled nitro entirely, where clicking on the file opens an installer again.

This happens with any .dwg file we received for them, when i force the file to open with Nitro pro by selecting the executable, it crashes immediately and says it couldn't covert it to PDF.

 

This is on Nitro 11.

 

Please if anyone's seen an issue like this let me know!