Hi, I have successfully cracked the 13.5.1 version completely based on the crack found here (thanks Rhode or whoever did the 13.5.0). Unfortunately this crack has the same issue as the 13.5.0 version crack, MDAirSync.dll is activated and licensed, but for 0 users only. Maybe original cracker would be nice enough to have a look at this issue? Google Translate: 嗨，我已经成功破解了13.5.1版本完全基于对裂纹发现这里（感谢罗得或谁做13.5.0）。不幸的是，这条裂缝的13.5.0破解版，激活和授权MDAirSync.dll有同样的问题，但为0用户只。也许原来的饼干不够好，来看看这个问题？
Never mind, this is only an issue when upgrading from an older version. It works fine when doing a fresh install. If anyone is interested in posting cracked 13.5.1 version here let me know you email and I can send you a temporary download link.
