You should already installed extensions.cfg when you installed KOReader.
It's location is in \system\config\ on your device. Now just open it with notepad, notepad++ or any other file editing software.
It should look something like this:
Quote:
pdf:@PDF_file:1:koreader.app:ICON_PDF
djvu:@DJVU_file:1:koreader.app:ICON_DJVU
epub:@EPUB_file:1:cr3-pb.app:ICON_EPUB
fb2:@FB2_file:1:koreader.app:ICON_FB2
mobi:@MOBI_file:1:koreader.app:ICON_MOBI
zip:@ZIP_file:1:koreader.app:ICON_ZIP
cbz:@ZIP_file:1 bimageviewer.app:ICON_ZIP
|
Now just edit entries to your liking.
It's simple setup, for each file format stated in a row, you can set an app to open it. App must be propperly installed in /system directory, and if there is no entry, device will run native reader.
For example if you wanted pdf files to be opened with coolreader, you'd change first entry to:
Quote:
|
pdf:@PDF_file:1:cr3-pb.app:ICON_PDF
|
For default reader, you could delete that entry athogether, or change it to:
Quote:
|
pdf:@PDF_file::1:fbreader.app:ICON_HTM
|