Extract the compressed file, change to the extracted folder and configure the program with themis_config.
After the inital configuration an entry Edit actions is available in your context menu.
For detailed information please take a look at the documentation.

digital.alterego at gmail.com
News
Release Candidate 1 is out
This release fixes some bugs and annoyances. Themis is now pretty complete.
Read on for complete changelog.
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Screenshots
Everybody loves Screenshots! Click on image to enlarge it.
It`s also possible to view the images as a slideshow after enlarging one.
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Documentation
For running Themis the following libraries and programs are needed:
Ruby Interpreter, tested with version 1.8
Korundum KDE/Ruby bindings
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Future Plans
Please use the sourceforge project page for reporting bugs and feature wishes.
Contact: digital.alterego at gmail.com
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Beta 4 just released