I checked other E2images.zip and no etc/enigma2 folder there either
I don't think it has anything to do with the /etc/enigma2 folder
This folder is automatically created after a first channel scan or installation of a plugin that uses this folder.
This time kernel.bin for a dm920 is included in the image and as far as I know you are using a dm900.
For now you can copy the etc/opkg feed folder from this last image and place it in the previous image,
and then do an online update to get the last image updates.
I will make a backup later with BA so that it works again for you.