Before the open network files on windows bug was fixed, i use geany 0.17, i just see you put a new release 0.18.2 who fixe it. so i try it.
But in 0.17 when you want to open a network directory, in open files window (or save window) you can write \\computername\ into the name input and press enter to see this directory. but it's impossible in 0.18.2. maybe this is a gtk bug.
Thanks for your work
sorry for my bad english