0.1.9 b149 is pretty old. I am one behind at b156, but it has been stable with some bugs worked out. Maybe download and install it, as a number of other packages have been upgraded since the release of b149. Or even to b157. Just a thought.
Molex 503398-1892 is the correct socket, however there are other components that need to be soldered. I counted 5 10k resistors next to the micro sd socket.
2 filter caps under the shield and maybe others.
So soldering the micro-sd socket is not preactical