Can File Size be Modified?

Sure, if you look for the following line in ht-gallery-proofing.php

'max_file_size' => wp_max_upload_size() . 'b',

You can change that to whatever you want, or if you want to change it across your WordPress installation, be sure to look at this page.

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For some reason I cant find that file… is it in v 1.11??

Apologies, I meant hero-gallery-manager.php. Hope that helps.