But, when I try to import, I get an Invalid Private Key.
11:54:50 importprivkey 6yaQrv7NFYxz4...omitted..... MVTE7E4oorSQLkSakAUxR1bgp2ibiE5dYd
11:54:50 Invalid private key (code -5)
Have I done something wrong?
I upload a fix - get the latest version from the main page and your private keys should import okay now.
Also, FYI a grant to MVTE7E4oorSQLkSakAUxR1bgp2ibiE5dYd will probably never be awarded . . it's for 70000 . . so you'd need to win over 2900(x24) grant blocks before it would be awarded. Try for a MVTEoEo or a small fixed grant award.