To list permissions you can use:
ls -lh /path/to/program.exe
The first section of the output will be the permissions, for example: -rwxr-xr-x which corresponds to 755
To change the permissions
chmod XXX /path/to/program.exe
Where XXX is the permission value you wish to change to.
Also man chmod
will give you much more detail on permissions and how to set / check them.