Replace zend studio installation directory plugins folder
com.zend.verifier_12.5.1.v20150514-2003.jar
file
Download :( crack file free download integral, I uploaded)
http://download.csdn.net/download/wwkms/9549943
3. Start zend studio 12, enter key:
12DEFB37585737F1E340ED71A75F32DF93F19404CD257BD27511C0EBEDF4FE7385516C34305912E34149CF85A9C7872F2C586288FEBCC8AF83DC7A1F37C465C2356664313735646236355445414D414D50454435623366313B30302F30302F303030303B31322E303B3030303B333B30