v0.1 (Oct/14/2008)
v0.3 (Oct/15/2008)
v0.4 (Oct/17/2008)
v0.5 (Oct/20/2008)
v0.7 (Oct/22/2008)
v0.84 (Oct/28/2008)
v0.93 (Feb/2/2009)
v1.2.1 (Sep/6/2009)
v1.3 (Jan/9/2009)
v1.5.9 (Dec/10/2014)
v1.8.1 (Sep/9/2018)
v2.0.0 on Big Sur(Nov/12/2020)
Note that it looks the same as v1.8.1 on Catalina.