Export issue

Does anyone know how to change how I download my recordings. For whatever reason it's set to Microsoft Excel as my default (I must have pressed somthing) so whenever I download I get an excel spread sheet and not my audio recording. 

Trying to add a picture to show but of course it won't let me do that either. 

When I click export the pop up comes up and says you have chosen to open (said file) which is set as a default Microsoft Excel so know matter what I open it with it opens as a spread sheet. Please someone help me in losing my mind