Create a text .txt file and paste this into it:
memory_limit = 256M
Then save it as .user.ini
note the point symbol!
Now you have to upload that file to your website root directory! If you have more than one site then you have to upload it to each of them!
Now go to example.com/phpinfo.php and check memory_limit
If it still shows 64M then log into your Godaddy CP panel and find PHP processes and kill them all!