The only way how to produce a simple text file from a .bwd document, would be to use the original BanglaWord word processing tool as no 3rd party program seems to support this unique document format. BanglaWord supports several output formats, including MS Word formats, RTF or plain text.
Convert BanglaWord document to Simple text.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert bwd to txt on Windows
BanglaWord is a smart word processing application, specifically designed for writing Bengali documents.
Convert from bwd file
to txt file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.