Some problem with checkio plugin for pycharm edu

Hi there!

I can't create a new checkio project. i see this error: ` com.intellij.diagnostic.PluginException: com/jetbrains/checkio/CheckIOProjectComponent : Unsupported major.minor version 52.0 [Plugin: checkio.pycharm.plugin] [Plugin: checkio.pycharm.plugin] `

What i do:

1. install pycharm (just download this http://blog.jetbrains.com/pycharm/2015/10/announcing-pycharm-edu-2-0-2-checkio-integration/)
2. run ./pycharm.sh
3. go to file-settings-plugins and install plugin, which i download from this http://evgraph.github.io/CheckIOPyCharmPlugin/
4. after that, i try create new project, but i don't see "checkio project"

can anybody help me?)

p.s.

yes, for good working this plugin, i must have java8 on my pc. i used Ubuntu 14.10, so:

`azart@azart-asus:~/soft$ java -version

java version "1.8.0_66"

Java(TM) SE Runtime Environment (build 1.8.0_66-b17)

Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode) `

what i do wrong?