@MyFartSoTart As I said in my last post, I'd recommend to access RetroPie via network either using Samba or SSH. This way, you can access all of RetroPie's files instead of only those that Windows can read.
Besides that, for small tasks like only some config edits or file operations, you can just drop to RetroPies command shell by pressing F4 in Emulation Station, and then enter mc to start the text-based file manager Midnight Commander. You can use it to navigate RetroPie's file system, view text files by pressing F3 or edit them with F4. See here for a quick user guide to mc.
To go back to Emulation Station, exit mc with F10 to get back to the command shell, and then enter exit or press Ctrl-d.