Change IP Address
From time to time, for some reason, you need change the External IP. This is why I put a document here. This is an updated version with more simple steps.
Click Change next to your IP address line
Change Attach to to None, then Click OK
Check the previous IP then RELEASE STATIC ADDRESS
Click RESERVE STATIC ADDRESS from top menu
Change Region and Attached to for your choice (region must match to your VM Instance Region, otherwise your VM will not show.
Mark your new IP assigned to your VM instance