With Windows 8.1 you just click open with but uncheck the 'do this for all files' or something like that. then the next time you right click the new program option will be there
try this Code: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\Open With] @="{09799AFB-AD67-11d1-ABCD-00C04FC30936}" [HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\Open With EncryptionMenu] @="{A470F8CF-A1E8-4f65-8335-227475AA5C46}" save in a text file and rename it .reg and run it. Not sure if it will work for win10.
I think you want your favorites folder in your browser then and uhhh. did you try the registry entry?