EverSync has all my dials but won't restore them to new FVD extension install.

I'm logged into my EverSync account, and EverSync knows it. I had to deep-uninstall Firefox, which wiped all or most of my extensions. I added them back in. FVD Speed Dial is the most important. It contained none of my dials. BUT there they are in my EverSync account. How do I get Speed Dial to find and use EverSync's backup? How do I get EverSync to give Speed Dial access? IS EVERSYNC THE SERVER THAT TAKES PRIORITY IN DATA MERGE? I don't dare sync my laptop with my desktop, because if I do it wrong, I'll wipe the desktop's dials too.