Yes, homebridge will work. You are going to need to set it up again. Not sure which smartapp you were using. I use the following:
As for the switches you can not get connected to the hub, what brand and model? If they are z-wave, try a z-wave exclusion on them and then try to pair them. To exclude, go to the Devices section, click on the Home icon in the upper left of the screen, select All devices and locate your new hub and open it, then select the 3 dots in the upper right of the screen and choose z-wave utilities. You can exclude z-wave devices from other hubs.