restart your download and note the download folder. you need not actually start the download, just watch for the folder used.
then check that folder for the previously downloaded acrobat pro.
Downloadable installation files available:
Download and installation help for Prodesigntools links are listed on most linked pages. They are critical; especially steps 1, 2 and 3. If you click a link that does not have those steps listed, open a second window using the Lightroom 3 link to see those 'Important Instructions'.