Today I own hundreds of thousands of ECA on a desktop wallet i cannot even access due to lack of maintance and support (XEP discord admins won't even help with recovering my eca's..)
You can use the privkey to access them in
https://github.com/KomodoPlatform/atomicDEX-Desktop/releaseselectra-cli dumpprivkey <youraddress>
and use this privkey to create a wallet in AtomicDEX... "Import wallet", "Allow custom seed" and use the privkey as seed.
And then you can trade the ECA on the DEX directly out of your wallet... if you want to.