Hello David,
Thank you for your reply.
The framing simulator is provided by a framing company in Japan. They are very authentic company, they’ve been in business since 1928 
You can try the simulator freely, but the problem is that they offer the instructions for use in Japanese.
I’ve shared the English translations of the instructions here.
Hope this helps, and hope you enjoy virtual framing experiences for your future works just as I do! 
