Today I purchased WSSS and the WSSS Real Color Livery. After installation, WSSS comes up but it is using the default airlines (Goldsun, Aussie, etc).I noticed that there are several files missing from .../Extensions/Airfields/WSSS that are mentioned in the logfiles. These are wsss_airplanes, wsss_airports, wsss_airplanes. The folder .../Extensions/Airplanes/Texturepacks does include airplanes_texpack35 and airplanes_texpack35.manifest.
I have been running other airports successfully (EDDF, EDDM, EGLL, KPHL) with their Real Colors, so I believe this is a problem with the installation file.
I ran the .bat file and the logfile ../tower3d_data/output_log but it was too large to attache (48kB) so I edited it as administrator and truncated it but it now does not get populated.