I think I can help with the 'export' part for now. You can export your registry settings from: HKCU\BinaryFortress\DisplayFusion\
Export the whole folder to a .REG file and open it using notepad. You can delete everything except the 'custom' keys.
Your reg file should then like something like the following example:
---
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Binary Fortress Software\DisplayFusion]
"HotKey_Custom1_Name"="Move window to centre of monitor and size to 75% and 85%"
"HotKey_Custom1_Keys"="CTRL;WIN;67"
"HotKey_Custom1_ScreenMoveType"="0"
"HotKey_Custom1_MoveType"="9"
"HotKey_Custom1_SizeTypeH"="1"
"HotKey_Custom1_SizeTypeHValue"="75"
"HotKey_Custom1_SizeTypeV"="1"
"HotKey_Custom1_SizeTypeVValue"="85"
"HotKey_Custom2_Name"="Move window to centre of monitor and size to 100%"
"HotKey_Custom2_Keys"="CTRL;WIN;77"
"HotKey_Custom2_ScreenMoveType"="0"
"HotKey_Custom2_MoveType"="9"
"HotKey_Custom2_SizeTypeH"="1"
"HotKey_Custom2_SizeTypeHValue"="100"
"HotKey_Custom2_SizeTypeV"="1"
"HotKey_Custom2_SizeTypeVValue"="100"
---
In the event DFP looses his custom keys, you can double click this reg file and all your custom keys are back. It's the simplest and most efficient method at this moment. At least you don't have to retype all your custom hot-keys