It was not really the captcha system that changed but the structure of the notifications. Because the notifications changed the bot did not detect the captcha on time. To answer your question, it is very unlikely they change the notifications again this year.
Enabling/disabling the captcha solver will not have any influence. The problem was that the bot did not detect the captcha and not paused it self.
The "self solve" option is explained here:
[Only registered and activated users can see links. Click Here To Register...]
//edit
Version: 2.56.0.2 Date: 13-03-2014
-Fixed special characters in town names
~Uthar