If the Start button is greyed out, change your PC's system date to 2016 or 2017. This is a common bug in older crack versions.
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Since this version is modified to run for free, it is often flagged by antivirus software. While some claim these are false positives, cracked tools are notorious for carrying malware or keyloggers that can compromise your PC [2, 3]. If the Start button is greyed out, change