lost root because upgrade to 184.108.40.2065 blues
i downloaded alpha 6 tweaker but it did not work. same failed patching. so i did
1. backup bluestacks data.
2. modify version string in backup 220.127.116.115 => 18.104.22.1681
(else you cannot import into older version)
3. deinstall bluestacks 22.214.171.1245
4. install bluestacks 126.96.36.1991
5. import data. & root again with bstweaker