I will not let you down gently. That choice you got is from whatever was in the autosave folder (so that is every little bit that wasn't yet saved before the crash) or the last actually saved version. If you clicked "Saved version" then the autosave folder is emptied and cannot be salvaged. You have indeed lost everything you did since your very last save. The lesson is to not make two mistakes: the first is to not save for a long time, and the second is to choose "Saved version" after a crash. Only a combination of these two mistakes will make you lose your work.
The only reason to choose "Saved version" if you get that dialog is when you have deliberately force quit Logic in order to throw away all the work you've done since the last save. In every other scenario you should choose:
