What's the point of holding a coin that you can not easily exchange or swap?
The coin in question is less secure
suffered a 51% attack not so long ago. This is probably the reason most exchanges and swap services don't want to list it.
If I were you, I would just send the coin to an exchange, sell it off and buy something much better
Atomic wallet and guarda wallet also don't support the coin swap as well
Try coinomi wallet and swap through changelly, but you may have to just sweep the coin into a newly created wallet.