You do not need WinCE on that device to delete files on SD or device.
Any OS is good (Windows, iOS, Linux, Android ... whatever) if it can read SD as storage and browse files within or connect device as storage.
You will not run navigation program there.
If you connect your navigation to Windows system, it will automatically install driver (if it is not already installed) and connect it as external (removable) storage.
Afterwards you can do with it whatever you can do with any USB stick.
On posted image is picture of program version displayed, not map version.
If it is "real" program version, it is not from Jan. 2016.
To find out more, copy .EXE from SD to PC (any Windows) and open file properties -> details
You will find real program version, but not creation date