NeatReceipts databases (.nwdb) can be exported with the default programs to various formats for publishing or sharing purposes, including Excel spreadsheets (.xls, .xlsx). This can be done with default export function in the program. It seems unlikely any 3rd party software could convert .nwdb databases.
Convert NeatReceipts database file to Microsoft Excel Open XML workbook and spreadsheet.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert nwdb to xlsx on Windows
A digital filing system that helps to manage all of the paperwork on the computer
Convert from nwdb file format
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.