I replaced at least 4 of those... the easiest way to heat board from the other side, BUT you have to prep the board first to prevent it from delimitation:
- If you have PCB preheater use it, preheat board to 120(C) it's always easier to work with warm board.
1) Place board in oven on 120-150(C) for 5-10 mins to evaporate all "condensed liquid" from between the layers, you can skip that step but it will lower the risks.
2) Remove old connector.
3) Mix existing pads with lead solder and clean pads with Wick, do it slow do not force the process you can mess up the pads.
4) Tin the pads with leaded solder that will lower solder melt point, clean them after with IPA from burned flux.
5) Put very small amount of Flux on pads that will help to hold new connector on place, if you will put too much that will fill connector and it's hard to clean.
6) Place you connector and slowly heat ALL-board from other side to reach melting point
If you will do everything correctly it will be really easy and painless process. Main goal to not rush.
If you have dead board, practice it first.