It seems that both .prdot and .drwprp files are templates from SolidWorks 3D CAD software, albeit used for a different purpose. A direct conversion between prtdot and drwprp or vice versa is very unlikely, but if you really need it and think it should be possible, consult SolidWorks support forums.
Convert SolidWorks part template file to SolidWorks drawing custom properties tab template.
We found one software available in the database for this conversion.
Microsoft Windows software - convert prtdot to drwprp on Windows
A 2D and 3D CAD construction software
Convert from prtdot 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.