If you are getting the "How to open .e file issue.

Then do the following, to Update AdvancedSkeleton.
1. Run this MEL code in the script editor

string $curl=`asGetLatestInstalledVersionScriptLocation`+"/AdvancedSkeleton5Files/bin/curl.e";
string $cmd="\""+$curl+"\" -s -k http://www.advancedskeleton.com/hotPatch/AdvancedSkeletonHotPatch3.mel";
evalEcho (`system($cmd)`);

Then open the "About" section, and click on "check for update", then click "update"