If you are looking for a way to export data from .fr3 files from FastReport Studio, then it seems only this program can work this out as no 3rd party program probably supports FastReport formats. You can probably download a trial version and perform few exports of .fr3 forms.
Convert FastReport form to Microsoft Excel 97 to 2003 workbook.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert fr3 to xls on Windows
A report designer and data analyzer
Convert from fr3 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.