Uninstalled FIlebot Subtitles and installed the new one (Filebot Subtitles 4.7.5 - 4637) from the link you provided and it runs just fine. Update: So I right clicked Filebot in Applications, then Show Package Contents > Java > Filebot_4.7.5.jar and the Java applet works great. It's just when trying ...

Sure! What do you need from me?

Just submitting a +1 to this problem. 4.7.2 was working fine. Just updated to 4.7.5 and I'm getting the same error message. On 10.10.5, no problem with Filebot Subtitles.