I also have the same issue unable to fix a static ip address. I am using revpiconnect and revpidio, 1 have 2 ethernet ports firstly i want fix the ip address of the ports and by using an edimax wifi adopter want to access them over a network.
I added an edimax wifi adopter by seeing the wlan youtube video now i am able to access revolution pi virtually over a network remotely.
I have gone through the youtube video of fix ip address but when i implement, its not working ip address of eth1 is not getting updated. for your reference i am adding photos please go through it and help me to fix this issue
IMAGES:
https://ibb.co/dBCxKLN
https://ibb.co/1T2Vckh