Removing SMD connector from PCB
First, is that the temperature rating is the continuous temperature rating of the connector. Just think about that for a second. The melting point of solder is in the 200ish C temperature. The component survived that because it was only for a relatively short duration.

If you use a hot air gun, and you dont evenly distribute the the heat (meaning you hold the iron in one place too long near the plastic, you could damage it. But if you are careful, you can do it.

Another approach if you are worried about damaging the connector is to use chip quik 
It's a low melting solder that remains molten for much longer than solder. You glob some on, on all the pads, and keep it in its liquid state, and the connector will come right off.