There should be a pre-patched CiC_0.55.5_Windows version you can download that is hosted on itch, right below the download folder button. Then, on top of that since there are later patches, you can download this patch from Pixeldrain. https://pixeldrain.com/u/dFaUpRFx
Is Mega not letting you download anything without you paying them, or did you hit their daily download limit or whatever? If you're hitting the limit, you could always download the base version from itch and then just get the patch off mega, and the filesize would be very small. If it's straight up not letting you download from them ever, then ignore that suggestion.
Also let me know if you aren't on Windows and need an alternative download link for the Linux version or something.