Using BRU v3.5.0.0, v3.4.4.0, v3.4.3.0, v3.4.2.0 and v3.4.1.0:
When right-clicking on a network mapped drive (or subfolder), BRU behaves as if no drive (or folder) is selected, i.e. it is not bold in the left-hand panel, nor is the tree expanded. This PC is what is in bold.
This does not happen in v3.4.0.0. It expands the tree and enboldens whichever folder you right-click on.
This does not happen with normal drives / folders in v3.4.1.0 onwards.