If you need the functionality of PE Explorer but do not have a license, consider these highly capable (and free) alternatives:
or consider modern, free alternatives that support 64-bit files—something PE Explorer 1.99 cannot do. Heaventools Software Key Features of PE Explorer 1.99 R6 Static Binary Analysis: View the inner workings of files without executing them. Automatic Unpacking: Pe Explorer 1.99 R6 Serial Key