I need help with downloading plugins

[iDrBlue]

When I downloaded the ZIP file, I accidentally said to open it with Adobe PDF (ADOBE ACROBAT) and now I cannot undo this. So whenever I open a plugin ZIP file, all the plugins are PDF files. How do I undo this!?

 

here is a screenshot:

 

 

[xod]

Not a good idea to affect the registry but look at this video:

[Sozo]

They aren't pdf files, in fact those plugins will work as-is if you put them in the right folder. To change the default program back, right click on any .zip file, go to 'open with' and click on windows explorer.