When I got my L3+ it had VNISH firmware installed with a Dev Fee, is it easy to reflash it with Blissz 1.2 No Fee? Is that even a good idea if it's working fine? I couldn't really find a simple tutorial anywhere and I really don't want to mess anything up.
I haven't used the VNISH firmware but as long as it doesn't lock out updates it's easy.
Go to system, upgrade, at the bottom flash new firmware, choose file then flash image.