If you are looking for the decompiler itself, visit https://github.com/jindrapetrik/jpexs-decompiler
NEW : We have got a new blog where we post some interesting SWF internals info.List of issues
#231 Https support in "Open via proxy"
It would be nice to have https support in the "Open via proxy" feature.
Yeah, that would be awesome, but it is not easy to do. There have to be self generated SSL certificates to the same domain as target site, and webbrowser usually does not permit this. It shows a warning on some browsers, other browsers do not allow it at all (Firefox is pedantic for example). That's why SSL exists - to not be intercepted or modified.
FiddlerCore (http://fiddler2.com/fiddlercore) can decrypt https. It creates the certifiactes with makecert.exe (http://msdn.microsoft.com/en-us/library/bfsktky3.aspx) Yes, in firefox you have to manually trust the certificate:( In Options/Advanced/Encryption/View certificates: http://fiddler2.com/blog/blog/2013/04/01/configuring-firefox-for-fiddler I have a working example in C#, but probably it won't help you too much.
JPEXS, maybe find another way of using http open via proxy without warning browsers, it would be awesome :D
I'm unsure if this can be fixed unless an extension were to be made and we use the WebRequest API (which will be removed in Manifest v3 so only a select few chrome browsers and all firefox browsers will be able to use it) to intercept the traffic, so not sure if this should be closed or we attempt the route above