TrailRunner Preferences > Advanced > Import: click on the Reset button.
Solution: TrailRunner stores files in the following folders. Backup these folders/files and your personal data is safe.
> Read More about what files TrailRunner writes to your harddrive…
Hint: Another alternative to backing up your files is to place them in Dropbox. This also enables you to synchronize with other computers you own:
> Read More about how to synchronize your diary with other computers…
chflags nohidden ~/Library/
or you can open it by typing the following into the Finder menu item Go > Go to Folder box: