Versions
For people using an older version of OpenCart here is an easy way of finding their version.
If the default theme has a red, rectangular menubar. It is 1.3.2 or lower
If the default theme has a half red/half gray rounded corner menubar. It is 1.3.4
if the default theme is blue with tabs and no version number in the admin footer but no multi-store. It's 1.4.0
if the default theme is blue with tabs and no version number in the admin footer but has multi-store. It's 1.4.1 - 1.4.3
if the admin footer shows 1.4.4. It's 1.4.4
if the admin footer shows 1.4.5. It's 1.4.5 or 1.4.6.
if the admin footer shows 1.4.7. It's 1.4.7
You can download previous versions: here