You can easily change the navigation arrows in shrotcode. Please check following link for full list of shortcodes-
https://projects.bluewindlab.net/wpplugin/baf/doc/#!/plugin_shortcodes
Available Arrow Codes:
- Arrow Up : f062
- Angle Up : f106
- Double Angle Up : f102
- Circle Arrow Up : f0aa
- Caret Arrow Up : f0d8
- Chevron Arrow Up : f077