I've located a document on the official website that provides the following information:
CADRA runs on the latest hardware, as well as legacy hardware, including Windows XP and 7, as well as UNIX
UN Solaris and HPUX. Microsoft Word documents, Excel spreadsheets, or PowerPoint presentations can be
mbedded in CADRA drawings. Legacy data or data from other CAD programs can be imported as well.
As you can see, it said that it's running on the latest hardware including XP and 7, therefore it might be compatible with Windows 10 as well. However, the latest version of CADRA is needed.