STX Wallet

I have downloaded STX wallet in December 2020 and transferred successfully some BTC and about 3000 STX. I haven’t done any sending or receiving since. I have tried to send some STX few days ago to an exchange but no success, however I was able to receive some BTC to this STX wallet which worked, so that indicates that the wallet is still communicating with blockchain ? When finalising the sending request in STX wallet ,
I need to type 24 word recovery phrase, strange indeed. I have reset STX wallet twice but still can not send any STX tokens to exchange. Can someone assist please ?

Please use the new wallet for all STX transactions going forward:

The older version you have will not work for this anymore.