I downloaded some addons, used them for a few days then I accdentally moved my addons folder. The addons are still in the folder but now they dont work anymore. What should I do?

Moving your addons folder back to where it originally was might help.

But, um, I dont know where it was…

it should be in C:\Program Files\Steam\steamapps(your steam name here)\garrysmod\garrysmod