Fit4NM 3.8.6 was released on Sep 22, 2014.
In this version, we fixed two major bugs as below.
1) When configured to NONMEM 7.3 only, fit4NM requested that paths for NONMEM 6 be designated.
2) When estimating likelihood (no sigma in a control file), condition number was not calculated.
And, we added two functions to view and edit control and/or data files. In configuration, you can indicate the paths for external editor such as notepad, and spreadsheet program such as MS excel or OpenOffice Calc.