Answer: If you have been making backups with Foxhound1 - Tools - Backup Foxhound Database, you can restore from one of those backups as follows:

On Windows XP, copy the foxhound.db and foxhound.log files from:

C:\Documents and Settings\All Users\Application Data\RisingRoad\Foxhound1\backup\generation3 (for the latest backup)

to:

C:\Documents and Settings\All Users\Application Data\RisingRoad\Foxhound1

On Windows Vista, copy the foxhound.db and foxhound.log files from:

C:\ProgramData\RisingRoad\Foxhound1\backup\generation3 (for the latest backup)

to:

C:\ProgramData\RisingRoad\Foxhound1

See also...
How do I backup my Foxhound database?
How do I backup my Foxhound database on a regular basis?
How do I restore the Foxhound database from a backup?