Will people be able to decompile the executables I've made with PerlApp?
PerlApp does provide some level of code obfuscation. Decompiling executables is not trivial, but it is possible.
Critical copyrighted data and algorithms should not be included in Perl code within a PerlApp. If you are concerned about keeping important parts of your code secret, you may want to consider some workarounds such as:
Thanks for your response, it actual for me.