Probably, Stellarium got a different scripting engine with version 0.10.something, iirc. Or the old one was ripped out but the new one isn't ready yet. I did read in the latest manual of Stellarium that it can be started with the required commandline options directly:
See table, PDF page 27:
http://ovh.dl.sourceforge.net/source...e-0.10.2-1.pdf
Perhaps someone can make a small program similar to SH4toStellarium.exe that retrieves the neccesary data from the savegame files and runs Stellarium with those --longitude --latitude --sky-date --sky-time parameters. Prefferably for both Sh3 and Sh4. Next month I should have more time to give it a shot