I just re-installed Stardock Central and it shows ZERO of my old Stardock games there? What's up with that?
Are you sure you're using the same account? If you contact support@stardock.com, they should be able to help track it down. The new SDC only lists those titles that are currently available for direct download (latest release of each title, generally), but Elemental will at least be in there if it is on that account. You can check the full list of your registrations at the store site.
The lack of discount would have the same cause--no registration on the account you're logging in with.
I do have one related issue that I haven't seen an answer to:
It seems folks who bought GCII ultimate edition can get the games on Stardock Central/online download, but not the folks who bought the individual games.
I wish I could trade my regs for a GCII Ultimate.
Then again, if FE keeps getting better, I wouldn't be playing GCII again so it would be all moot. 