Doesn't look like this converter actually works with any saves that have been played with the latest CK2 version (2.2 I believe at the time of writing). The version format crash is just beyond me.
It's actually a real pain trying to get this to work despite the save incompatibility, as it seems the file structure of CK2 has been switched up since the converter was released (had to find the "missing files" which were hidden in sub-folders in the main folder that the converter was looking for them in).
Any attempts at using a save from 2.2 result in either a grayed out map in EU3, or a grayed out map with an unsupported save when attempting to port it back into a previous version of CK2.
I suppose until someone feels like picking this back up, this remains a pipe dream for me and anyone else.
If there's an alternative to this utility that actually works with the latest CK2, or a utility which makes saves from 2.2 compatible with 2.0.4, someone let us know. I've looked around but hit brick walls each time.
Until then, a warning to anyone interested in this, DON'T play with the latest CK2 patch if you plan on converting to EU3. I know this isn't most peoples concerns at this point what with EU4, but for those paupers like me who want to rely on the old stuff, take heed.
If the OP could notify which version of CK2 his converter is designed to operate with in the readme or op, I think that would save a lot of people some unnecessary headaches and wasted time.