If you are having problems with Java, we can assure you that you aren't the first. Fortunately, that means that a solution is probably a few mouse clicks away. Usually, just making sure that you have the latest and greatest Java Runtime Environment (JRE) from Oracle will do the trick.
If you still need help, please don't hesitate to contact us: support@exavault.com.
For Mac OS, Java is updated (at least for now) by Apple. What that means to you is that you just need to run a Software Update:
If you still need help, please don't hesitate to contact us: support@exavault.com.
You might be surprised to learn that Microsoft Windows hasn't shipped with a current Java runtime since about 2005 (it's a long story fraught with lawyers…). Therefore, making sure that you have the latest and greatest Java is probably step one if you are having issues with Java applets.
If you do need an update:
If you still need help, please don't hesitate to contact us: support@exavault.com.