If I understand correctly, you want to make the PC which connects "wirelessly" connect instead with a "wired" ethernet connection? Similarly, you want the PC which is currently "wired" to connect "wirelessly" instead?
That being the case, with the PC that is currently "wireless", you would simply connect it to the router by ethernet cable and remove the Wireless Network Adapter.
In the PC that is currently "wired", remove the ethernet cable, install the Wireless Network Adapter and then go through the procedure to "Connect" to the wireless network (your Hub/router).
Apart from the installation of the Wireless Network Adapter software in the PC that is currently "wired", there is no need to mess about with any other software or anything to do with the router.