Post the file. The screenshot doesn't really help.
The MZ part followed by "This program cannot be run in DOS mode" is just meant to inform people running the program on DOS/DOS mode that it isn't going to work.
If you're running linux just do `file` on it to see what it is. You could use strings, strace, ltrace, gdb, or any host of other commands to look into it if you're using linux.