Any suggestions/advice?
- Abandon applets completely1, or
- Lower the requirements (no 'right click').
They were always a PITA, and that increased by an order of magnitude with the recent security updates.
- If the functionality does not need to be embedded in a web page, you might have more luck with a free floating
JFrame
launched using Java Web Start. OTOH, it might have also become subject to the 'no right click' philosophy.