I tried every single folder but I am quite puzzled that IXEG not updating FMS 2013 airac cycle.
Welcome and Compliments of the Season.
Please disable any Antivirus and firewall.
Please use Windows to uninstall FMS Data Manager.
If they exist, please delete folders:
c:\ProgramData\Navigraph\FMSClient and c:\Program Files (x86)\Navigraph\FMS Data Manager.
Please download and install latest FMS Data Manager .
Check you have correct X-Plane 11 path in FMS Data Manager Settings tab.
In Addon Mappings Scan should find IXEG 737 Classic with mapping …your X-Plane 11\Aircraft\X-Aviation\IXEG 737 Classic
Please let us know how you get on.