Here are some helpful tutorial videos in order for you to get the most from Dapper:
General:
Demo
A quick demo of what Dapper does.
More details on Using Dapper
Using Smart Playlists to select what music is copied to your DAP
Full run-through of all Dapper Settings
Specific DAP Examples:
FiiO X5
Full setup from SD Cards through full synced player.
Sony NW-ZX2:
Astell & Kern AK100II, AK120II or AK240:
SyncMate Setup in order to connect Astell&Kern AK100II, AK120II or AK240
SyncMate - Install and license setup
Toubleshooting Dapper
Troubleshooting Level 1 - Basic troubleshooting
Troubleshooting Level 2 - Crashes and/or more detailed troubleshooting