.exe changing to .stl on download

[phasmid]

Hi, when I dl an app or program it always has the file type .stl which is a 3d printing file and Cura starts if I click it. Cura is my 3d slicer program. If I change the file type to exe it works ok. Not big problem but annoying. Any help appreciated.
TIA

 

[BrightBlessings]

Use the exe one.
http://www.sevenforums.com/tutorials/19449-default-file-type-associations-restore.html