What are those files ending with `e` and `eb`?

When you opt for 'non-transparent transliteration' (NTT), only one file will be created.

When you do 'transparent transliteration'(TT), 3 files will be created, including the extra ‘e` and `eb` suffixed files.

For ex: If you give file name as 'test1' while saving, 'test1.rtf' will be the only file created during NTT. But, 'test1.rtf', test1`e`.rtf and test1`eb`.rtf - 3 files will be created during TT. ‘test1.rtf’ is your main Tamil file. test1`e`.rtf is the file holding your English text. test1`eb`.rtf is a support file. Dont delete the last two files (`e` and `eb` suffixed) mistakenly.