PHP Fatal error on line 164 of shortcodes.php

I’m getting a repeated PHP error from the Q & A plugin that reads as follows:

PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 267416 bytes) in \wp-content\plugins\q-and-a\inc\shortcodes.php on line 164

I’m running php 5.3, IIS server, and wordpress 3.41

Any suggestions on how to fix this error?

http://wordpress.org/extend/plugins/q-and-a/