JRE-wide accessibility is enabled using the file

<jre>\lib\accessibility.properties

Presence of this file changes behavior for all executed applications. Alternative way is to comment the contents of accessibility.properties and use the following command line switch for java instead:

-Djavax.accessibility.assistive_technologies=com.smartesoft.smartestudio.accessibility.AccessBridge

So the full command line for launching application may look like:

java.exe -Djavax.accessibility.assistive_technologies=com.smartesoft.smartestudio.accessibility.AccessBridge -jar applet.jar