No, the WindBurner is not designed to be used this way. To achieve similar performance to an inverted canister in cold weather and with low fuel, the WindBurner uses a built-in pressure regulator. This regulator design allows the stove to deliver a faster and more consistent cooking experience than using the canister inverted, down to 32◦ F/0◦ C canister temp.
Do not invert the canister on your WindBurner stove. Doing so can lead to extremely dangerous flare-ups or liquid fuel build up. The fuel line connection was intentionally designed without a swivel connection to prevent such use. If you wish to use the WindBurner in temperatures below freezing, place the canister in a bowl of water. As long as the canister stays above freezing, it will operate at full output, providing fast boil times and excellent fuel efficiency.