contact form 7… increasing the default 1mb upload

Hi all, I’m using Contact Form 7 with file upload options. I can submit the form and upload files under 1mb with no problem. I understand this is the default setting. I’ve spent the last 2 hours researching this topic in hopes of increasing the default limit to something like 10mb, but have been unable to fix it. Things I’ve tried to no avail:

– switching theme (currently using Simple Catch)
– turning off all other plugins
– replacing the jquery.form file to an older version suggested on another thread
– setting the uploaded file directory permissions to 777
– changing this line of the file.php file to something much larger i.e. replacing the first “1” with a “5” or “9”: $allowed_size = 1048576;

I’ve read this article (as well as several posts on the WP forum) and haven’t found a clear answer: https://contactform7.com/file-uploading-and-attachment/

The exact error I get is the yellow boxed “Validation errors occurred. Please confirm the fields and submit it again” with the upload fields having the red text “This file is too large” over them.

I’ve read about a “php.ini” file and a “httaccess” file, but I have a suspicion my web hosting isn’t going to allow me to edit these: Yahoo! does not currently allow you to upload .htaccess files to your account.

Any ideas?

Thanks.