You need to create a new wallet, but do not delete the existing one. Private key does not move.
Follow the next steps.
Open your wallet, click on the top left menu, then hit the “+ COINS” button in the button and select “Bitcore” from the mind-blowing list of Coinomi’s 86 supported coins and 214 tokens.
A pop-up dialogue will appear, asking if Bitcore should be added. Hit the “ADVANCED SETTINGS” button. In the “Derivation Path” please enter:
M/44H/0H/0H
Please note that the characters before “H” are zeroes and not O’s.
Hint: If you have more than one Bitcoin wallets in your Coinomi and want to claim the equivalent BTX you will have to repeat the above process, replacing each time the last zero with the (zero-based) account index, so for the second wallet this would be M/44H/0H/1H, for the third wallet it would be M/44H/0H/2H, and so forth.
Now click “ADD”.
That’s it! Your BTX wallet is now ready!
After you move BTX from your newly created wallet to the old, you can delete the newly created.