I have a feature suggestion for the navigation inside the jAlbum client: You already provide "bread crumbs" of the folder tree at the top of the thumbnail window (see attachment). If I double-click on any tree part, it opens an Explorer window to that folder, which is nice.
However, navigating back and forth is cumbersome. What I propose is two things:
1) Use that bread crumb folder structure and when SINGLE-clicked, jump back to that folder. When double-clicking, you can continue to open an Explorer window to that folder.
2) Allow standard browser back and forth navigating: ALT/OPTION-LEFT or ALT/OPTION-Right should go back / forward to where you just were. I have programmed that into my trackball. A single button click would get me back to the last or to the next folder where I just was.
jAlbum 34 supports ALT+left or right key to navigate back and forth. It also supports the back button on mice that supports it.
I think implementing single-click navigation in the address bar of jAlbum is bit more involved as it may easily interfere with editing paths. I know how they've resolved this in Windows, but that requires quite a bit of coding.