Here is the error message I get when updating WPCB from version 2.4.2 to 2.4.4:
Plugin could not be activated because it triggered a fatal error.
Parse error: syntax error, unexpected '@', expecting T_STRING in /home2/streety1/public_html/endev/wp-content/plugins/wpcb/index.php on line 2035
There is an extra @ in front of the wpcb_display_payment_icon_page_title that the parser does not like. Removing it solves the problem.
Thank you Thomas