Check for Backslashes

[ahcvankampen]

The Navigate.exe only works with the -f option if forward slashes are used
Thus,
C:\Users\addane\Downloads\20230508_FSS-Navigator\Navigate_W.exe -f C:/Documents/20240115_testnav
works

but using the Windows \ will not work:
C:\Users\addane\Downloads\20230508_FSS-Navigator\Navigate_W.exe -f C:\Documents\20240115_testnav
and results in an error.

This should be automatically checked in the code