I think that if you have a Shared Modules path entered in the "Configure Paths" dialog, clicking the "Add Existing Module" menu item should open said directory.
Yes, hunting around for the right directory can be a real pain (you know where) most of the time.
I have been using a free product called FileBox eXtender for years that saves me a ton of time selecting commonly used directories.
It is NOT a standalone program. Instead it installs itself into the window title of virtually every MS Explorer window, including File Open dialog windows like File > Open Source so you can easily open B4x projects from your favorite B4X project directories.
You can add your favorite directories at the root or under a submenu. I have a submenu for B4A directories, another one for B4J, another one for icons and images etc. Any of your favorite directories can be selected in 2 or 3 mouse clicks from wherever you are and from any program.
I did find one minor bug in the software. You cannot add a directory to its menu structure from a
File Open Dialog window. You must add directories using a normal Windows Explorer window. This is a minor flaw, but it took me a while to figure out why the program was crashing seconds after adding a directory.
You can get it here. I have been using it on XP and Win 7. I can't say for sure if it works in Windows 10, but it might. It is worth its weight in gold.
http://www.hyperionics.com/files/