data/UserManager.java: hide unneeded stack trace

  * hide unneeded stacktrace from old logindata parser
Merge pull request #701 from jikuja/fix_numberformatexception

data/UserManager.java: hide unneeded stack trace
Merge pull request #702 from Viper-7/master

FIXED: Permission error from OSX Java version detection
FIXED: Java binary permissions issue on OSX