All the versions of Yasune can be downloaded here. They go in descending order from newest to oldest, so, you're gonna wanna download whatever is at the top of the list for minimal suckiness.
Yasune 1.5 (1.3 and 1.4 were skipped due to this being a major update)
Yasune 1.2
Yasune 1.1
Yasune 1.0
Yasune BETA
