Sadly, it doesn't give access to filename filtering using extensions, and i appreciate that a regular expression could be used that would filter on the second-last node name, but having a preferences switch, that treated the second last node name as if it were the extension, for all shortcut files, based on the target-name, would be the optimal solution for users here, and a large part of the purpose of Opus, is, I think to make workflow, and file management, far easier, more accessible and powerful, than the native windows file managers, or frankly, any other third-party file-manager.
Can we treat this as a feature request ?
If Opus is as well-designed as I suspect it is, then it may even be a fairly small amount of work.