I am trying to transfer Blackbytes to another wallet I have on another computer but I can't. I've paired the devices but still can't. I've checked the Byteball wiki but I have found only instructions on how to trade Blackbytes with bots etc. The very simple issue of tranferring them I didn't find.
Can you be more specific about how you can't? Do you have an error? Does your transaction get stuck at some point? What do you exactly do?
No errors and nothing gets stuck. Simply, when I try to send the Blackbytes I don't get any address displayed to which I can send them to. And the apps are paired, I can chat between them. But no way to send the Blackbytes.
Send the receiver's address using "Insert address" from the receiver's chat interface. Click on that address in the sender's chat interface and normally you should be able to choose blackbytes and send them. As HCP pointed out, you need bytes to pay for the transaction fees.