When importing from seed dcrwallet creates two accounts, one each on coin_id 20 and 42.
Can't see how to force slip44 upgrade to run in dcrwallet, checking for either key instead.
dcrwallet requires the password to be entered at the first startup when encrypted.
basicswap-run with --startonlycoin=decred and the WALLET_ENCRYPTION_PWD environment var set can be used for the initial sync.