luicid

Hi all, So i'm pretty new to this whole modding community, and I've been using Nexus Mod Manager for a few weeks now. This morning, I booted up my computer and tried to start a game of Skyrim Special Edition, and while the launcher worked fine, pressing 'Play' simply closed the launcher and didn't start the game ( I've looked in Task Manager, the process simply didn't initiate). The game was working fine yesterday, the only difference I could find was that NMM says I'm not logged in (bottom left of the window, along with a small, rather depressing red torso). Perhaps I'm simply blind or stupid, but I can't seem to find any way to log in: there's no button for it, there's nothing in the settings about logging in, I just can't find it! Any help would be appreciated, Thanks guys. (I'm on version 0.63.13 btw)