Ubuntu 12.10?!? That was End-Of-Life years ago. Please upgrade to a supported distro version, e.g. 16.04. Also the latest version of STK is 0.9.3, you can use this PPA to get it: https://code.launchpad.net/~stk/+archive/ubuntu/dev (requires a supported version of Ubuntu).
Contributor to/fan of STK (Upstreamed Cartoon theme, numerous random big fixes/tweaks)