Thank you for your request and your long support of Max2Play.
Did you also exchange the router? Raspberry Pis can sometimes have issues with channel 13 WiFi. So if your router uses this channel, try changing it to another (10 or 11).
You can also try WPS to connect to your local network if your router supports it.
Also, with Max2Play from 2.44, there should be an automatic access point being established as soon as the Pi does not find a network to connect to. You can then connect to Pi’s own accesspoint network to access the webinterface there and enter your SSID manually.