We were going to upgrade the version of Vuforia that we use in our projects, but as it stands now we cannot. By moving several scripts into the new dll Vuforia have disabled us from using some custom functionality that was core to how many of our projects worked.
This mainly involves to removal of DataSetImpl which we had extended to allow for the loading of DataSets from custom locations (we do the same with video files too).
The extended trackers is a new exciting feature that we really want to make use of, but the upgrade nightmare is currently halting our progress.
Is there a version available with the new features but still in full source code without the dlls?
I see. The ImageTargetEditor looks for the image target textures in a specific directory, these textures are used for rendering the Image Targets in the scene view of the Editor. So, you should not move the location of those "special" directories used by Vuforia, even if in previous versions of Vuforia this was "technically" possible by modifying the editor script code to point to a custom path.
If this is somewhat in conflict with your "desired" directory structure in your project, my suggestion is to introduce a distinction between Vuforia specific assets and other assets you use in your project, and apply your specific desired directory arrangement to the latter.
I will also bring this issue to the attention of our team, just in case there is any additional tip that they could share on this topic.