Yes run it again and remove it.
Whilst the MyWebSearch is a mild issue, it frequently comes with other products. It purports to make your searching more relevant to you, etc. but it gathers data which can be used for marketing purposed and directed ads, you are better off without it.
It will have zero impact on your system stability, MBAM also places copies of the items/entries it removes in quarantine that would enable you to restore if required.