Deleting astrikes from a text file

Hi all,

My professor sent me a huge file (millions of rows, dozens of colums) with numers and what not.. but before I could even analise it, i need to clean it: meaning I have to delete the whole rows where I find an astrike (error on their code)

Any idea how to do so quickly? I can't even load the file using dlmread cause it encounters the astrikes and gives me an error