If you are looking for a review of the actual software (Sumatra PDF 3.5.x),
The software is a legitimate open-source project released under the GPLv3 license. There is no "Pro" or "Full" version to buy, meaning there is no need for a "crack." If you are looking for a review of
You can download a portable version that runs from a USB drive without installation. If you are looking for a review of