Automating Tests for AutoCAD based development

Our company develops an add-on product for autocad, catering to a specific engineering vertical. We were testing the product manually so far. Now based on the market needs, the development picked up momentum , and hence new codes are written daily by a team of developers. We find manual testing of the software very time consuming. The off the shelf regression testing software don’t support CAD OPERATIONS( pick points, zoom etc). Looking for some advice/ suggestion, other than writing our own testing framework. Thank you in advance for any suggestions.