fatal error after Formidable upgrade

Just installed the latest Formidable Pro update (premium version that I paid for).
The result is the following error, when I try to access the “installed extensions” dashboard:

Fatal error: Allowed memory size of 94371840 bytes exhausted (tried to allocate 143 bytes) in /home/users/b/belougas/www/belougas/wp-includes/pomo/mo.php on line 213

Other effect: I can no longer edit posts.

When I remove the plugin directory using FTP, the problem is resolved.

I know you will tell me that I have to ask my host provide to increase the memory, but I still think this problem shold not happen.

Thanks for your help.

http://ww.wp.xz.cn/plugins/formidable/