First of all, your movie download issue sounds as though you're seeing fake files. Always check movie files with Bitzi before download. If a file has 19,732 sources (that should set off the alarm bells...wow that's a lot) but no Bitzi rating, chances are that the file is fake!

Check the threads below for more info, tips & links to Bitzi. The second thread has info that also applies to video.

Fake files showing up in search results
How to find music

Now to your Pro question. If you bought Pro from www.limewire.com then the email you recieved will have a link to your Pro personal download page. Bookmark this link, you can use it to download Pro installers for up to 6 months after purchase AFAIK the email wouldn't contain a .exe file...unless you've bought Pro from somewhere other than the official site.