When I replace my older installed version of NetWorx with the latest portable version, how can I do so without losing my old data? I can't figure it out because I can't find the old data file.
Yes, copy your data files from (depending on your system)
either
c:\Documents and Settings\All Users\Application Data\SoftPerfect\NetWorx
or
C:\ProgramData\SoftPerfect\NetWorx
and place them into the folder where you unzip the portable version.