Excelsior JET 11 + latest fixes
What programming language was used?
Does the Win32 app. use or rely on java?
Java, it is 100% the exact same code as the Java version, not a line of difference, not a line of conditional cases (if Jet-compiled, do this, else that).
Given that it is both compiled and its own JVM, it does / should not rely on your installed Java, you do not even need to have one installed
Excelsior Jet is a compiler for Java from my understanding (i.e. you do have an actual executable) but also a JVM as it can dynamically load classes that were not known at compile time and use them (not that I use that at all, everything here is statically compiled)
Are there any command line switches for the app?
Do you have the source available for download?
Does the app. require network or internet access?
Does the app. make use of the Windows registry? (if so, please provide details)
Does the app. use or interact with the Steam client?
no to all of the above
the ‘source’ for Excelsior is the .jar of the Java version (plus the included jar libraries) 
Can you provide some information about your deploy test environments?
none of this should matter, i.e. the compiled result is the same, both for the .exe and for the .jar regardless of the system I have
Not sure which Java version I used at the time of compilation, code wise it should work on 1.7 and 1.8, Excelsior is on 1.8_072 or so
I am on Win 8.1 x64, laptop, 32GB RAM, i7-2820QM, but as I said, this should make no difference, at best it shows you a setup it is working on
The Java (64bit) v8 update 91 package from Oracle is installed.
I do have the 0.98c java version in use but I wanted to upgrade to the latest version.
so you could use the latest Java version. What happens if you use that ?