Thanks Ron,
OK, I also emailed Scott, and he suggested copying the .dat file again. Did that, no improvement. Note that I read mail on a Mac, but have had no trouble moving files via thumb-drive to my PC's which are not on the Internet (as a novice PC user, I'm very unsure about being savvy enough to avoid viruses, and the PC's serve only for CNC and associated programs). Anyway, the Mac shows a nice graphic on the .dat file, but the Vista PC with the Tormach shows none. The XP shows a different graphic. No idea if any of that means anything.
NFS v284 comes up on the Tormach (from the menu), but is severely broken -- buttons do not respond, so unable to advance beyond first screen after opertion select. DRO there can be edited. v272 appears to work somewhat, but after posting G-code (return to select screen), Preview button does not show G-code. On exit get "Unlicensed Wizard File" in place of G-code.
On the router table with standard Mach3 and XP PC, v284 works (appears to work) to the point of generating plausible G-code visible in the Preview screen. (This is same behavior as v279.) But same "Unlicensed" delivered to Mach on exit from the Wizard.
Properties on the WizLic.dat file in the Tormach shows:
C:\PCNC3, 201 Bytes, 4KB on disk, Attributes A, Owner Machine-Owner-PC, Computer Machine-Owner-PC
As before, any help much appreciated. -Dick