I upgraded my winzip, but now it doesn't work from Yahoo mail. How can I connect the new version of winzip?

My husband wanted to get the latest version of winzip, so we upgraded. Yahoo mail allows you to download multiple files as a zip file and then unzip them from the mail program. Yahoo mail seems to still be accessing my corrupted old version of winzip, because it consistently dies with an error message. Winzip, outside of Yahoo mail works fine. Suggestions?