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i've downloaded unrealengine 4.22 BUT it doesn't appear in the launcher

i’ve downloaded unrealengine 4.22 BUT it doesn’t appear in the launcher
the file UE_4.22 is on my computer how to let the launcher read it ?
and the uE 4.22 works correctly BUT it doesn’t appear in the launcher
also plugins don’t apply to it
what should i do ?
please HELP