Greg,
Pay heed to the good warnings you've been given: Multiple versions of files in different locations is a nightmare.
To answer the question in your last post, when you open an assy SWX looks for the parts in the last location it was pointing to for the particular files. Normally this is just what you want and the files are in the correct directory. HOWEVER, let's say you have just started SWX and opened a few parts in a different location. SWX is now referencing those parts where they are. If you then open an assembly that is looking for those same parts, but was expecting them in a different location, such as the ones the assembly last referred to, then you effectively have thrown things into the blender. The assembly was expecting the parts in one location, but the active session of SWX is overriding that with the parts that are open in another directory.
I do not mean to be harsh, but your comment about not seeing a problem with multiple copies/versions in different locations and why would it matter is an indication that you do not understand the fundamental relationships of the files and the care you must have in dealing with them.
Best advice is to learn how to use the PDM available in SWX (PDMWorks). If you will not or cannot do that then your next best option is to research this forum for threads relating to file management in lieu of a PDM. There has even been a very recent thread related this subject. This forum has great help and advice, but the users are more patient with those who have first done their homework and run through the tutorials and researched the forum before posting their questions.
- - -Updraft