David, Dometic has purchased A&E. The only instructions I have found on their site that discusses tensioning the awnings is listed below. Page 5 and 6 show retensioning.
http://www.dometic.com/FileOrganizer/1-international/Operation%20&%20Installation%20Manuals/Awnings/Sunchaser-8300-service-instructions.pdf
If your window awnings require some effort to pull down, I am not sure it would be worth the effort on an A&E. I don't see any A&E product that operates the way the ZipDee Awning Travel Lock does. There are a couple of links that might be of interest to you.
Here is one specifically for window awnings (although I am not sure how secure it would be):
http://www.sportsmansguide.com/net/c...7&kwtid=296697
Here are a couple of solutions that appears to be aimed at the main awning but might also work on a window awning.
http://www.anythingrv.com/staticpage...RV_Awning_Lock
http://www.dasplace.net/Awning/AwningFix.html
Typically the side of the window awnings makes them much less susceptible to billowing out while driving than the much larger main awnings.