As far as the ‘proc’ directory goes – it is not part of the problem or solution. It simply contains the source-code of the standard procedures – and is quite likely years out-of-date. Ignore it.
When moving NV to a new computer, it is by far the best and easiest practice to copy all of the NV program directory to the new machine, as well as your actual books. When you do this, you get *all* the program files, plus the procedure library files, and you should be able to pick up where you left off on the old machine without missing a beat.