"Plus! tab not in WLM window" means Plus! didn't integrate itself into WLM, doesn't it?
What if you return to the previous version you use before update?
Can you post your system info? OP and WLM version.
You should make sure that WLM doesn't run in compatibility modes for old OPs because Patchou said in a thread that Plus! didn't integrate itself into WLM if WLM reports an older OP than XP.
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