This is the last release that uses SSH keys to authenticate to the leapster.
There is a corresponding change in retroleap to remove the use of these keys and use open authentication instead.
tl;dr - for any retroleap version up to and including v2.0.0-alpha4, you need to use this version of sshflash.
For versions newer than v2.0.0-alpha4, you should use the latest version of sshflash.