I've transferred from DigitalOcean's network over to Vultr, which offered far more storage capacity for the exact same price.
Thanks to this, I've raised the file size limit to 500MB per file!
So far the only thing that seems to be out of place after the move is the captcha image, which seems to have stopped working. I'll work on that soon, please report any other weird inconsistencies.
(If you're having trouble connecting, do ipconfig /flushdns in your cmd or powershell and try again before reporting it. DNS changes sometimes take a while to settle on your system.)