what browser are you using?
Most browsers have a file type / creator association that will open the app that the browser has associated with that particular file type.
Or, try this...
...Right-click on the file and select 'get info.' Now in the window that opens up, click the 'open with' triangle. You will get a drop-down list of apps to open the file with. Choose the one you want (Real One) and also click 'change all.'