Please see the release notes here:
This release unlocks the trial period to “unlimited,” and is ad-supported on a trial installation. Please consider buying the app, which will remove the ads.
There is a known bug with this release:
Rarely, during a resize of the terminal, an exception will be thrown while copying lines from the old screen buffer. This will disconnect you from the server. Release 9 will contain a fix for this bug, but the bug is rare enough that it should not occur often.
Thank you for your support! Keep an eye out on the blog for the Release 9 Preview.