When you've had to re-install your operating system (for whatever reason), it is crucial that you copy your database(s).  They are not located in your home folder.

If you've already done a 'Archive and Install', then your databases will now be located in: Hard Drive -> Previous Systems -> Previous System 'n' -> Users -> Shared -> Databases.obstorage

NOTE: in the above path 'n' represents the number of a previous system (such as '1', '2', etc.), with the most recent previous system having the highest number.

Please resintall DayLite (grab the latest copy from our downloads page if you don't have it). Once you've reinstalled it, copy the Databases.obstorage package from the most recent 'Previous System' to Hard Drive -> Users -> Shared.

With the database in place, you can launch Daylite and continue working.

NOTE: You must reinstall Daylite in it's entirety (including the Palm Conduit if you use it)
Also, you can set your database to start at boot in Daylite -> Preferences -> Database Administration.