Hi all,
Received my Galaxy Tab A, how do I transfer the licenced Litchi app from my phone to the tab?.

As long as you are using the same Google account you can install it on as many devices of the same platform as you want. It's all about the account you use to install it.

I have found that my Tab A is not compatible with the RC firmware of v1.8.  I, and may others, have had significant video transmission issues with this version of firmware on many Samsung devices.  You may need to use v1.6 with this tablet.