I am using wallet version BitCore BTX Version 0.14.1.6 and i have coins there it is encrypted and i registered that adress for the airdrop. In the meantime i mined coins on suprnova so can i send them to the old wallet version or do i instal the new wallet BitCore BTX Version 0.15.0.2?? and send the coins there? and register a new airdrop adress?
You can still use the older wallet. That's not a problem. The new versions of the wallet was not a mandatory update. But when you update your wallet, you can still use your old registered address to receive the airdrop and pool payout. So long you use the same wallet.dat file from the old wallet for the new wallet, your addresses and keys are still there.