Legitimate license keys receive updates. When Microsoft releases security patches for Internet Explorer (or its replacement, IE Mode in Edge), the official IE Tab updates accordingly. A cracked version is frozen in time. You will be vulnerable to known exploits like CVE-2021-26411 or other ActiveX vulnerabilities that were patched years ago.

While the lure of "Extra Quality" features for free is tempting, the security risks to your computer and data far outweigh the benefits. For most users, the or the standard free version of IE Tab will provide all the necessary compatibility tools safely and legally.