On second thought, since your file was just imported and there are so many bad entries, I am doing the entire deletion for you. Everything will be cleared out. (For others who might be read this: This is an usual step and almost never done. See the GEDCOM FAQ and pages on deletion.)
If you're able to export a new file from MyHeritage, e-mail me at chris@ after you upload it and I will see if it has the names.