Which version of EPGImporter do I have to install?

There are 5 versions:

OE-A version- available to receivers using any OE-A image. (ATV, VIX, OBH, HDF etc.) Code is opensource and people can contribute to it. This is installable from the plugin server.

OpenPLi version- available to receivers using official PLI. Code is opensource and people can contribute to it. This is installable from the plugin server.

Lullua/Belfagor's version. He can better describe what his beginning source is and what improvements he has made. See his thread.

Dorik 1972's version. He can better describe what his beginning source is and what improvements he has made. See his thread.

IET's version. He can better describe what his beginning source is and what improvements he has made. See his thread.

I would recommend that you install the one from the plugin server. Report any issues you experience to your image team and they will look to fix it.

Please do not mix up EPG Importer issues with EPG source data issues. They are two different things.