Any update?
Did OP open the wallet and forgot about his promise?
I was able to download Blockstack .18 on Ubuntu thanks to the instructions PawGo gave my via DM (thanks PawGo).
The wallet has 3 keys (data, payment, owner). But I only have a "master key". So I'm not sure if I need to download an even earlier version of Blockstack or if I need to extract the payment key from the master key somehow in version .18.
I emailed Blockstack support but they still haven't responded.