I reformatted my hard drive and installed Windows 10 64-bit. Downloaded the latest driver for my R7 260x, on my previous Windows installation, which is the same OS btw, I can record video using relive but in this one the ReLive tab is not in the UI. Therefore I can't enable it.
the relive can only be installed during the installation process.
When installing the driver and at the end, you will get the option to install it at the bottom of the UI.
I would recommend uninstalling the driver and at the end of the driver installation process, look for the option to install Relive.