Non-PA format portable programs

Needs some help if possible.

Done some searching and found the obvious:
https://portableapps.com/support/platform#addingotherapps

However my problem is the portal program I am using uses the structure:

..\Myapp\bin\myapp.exe
..\Myapp\AppData
..\Myapp\Core
(etc)

So the problem is while the 'reshresh' app, seems to pick up if you do:
..\Myapp\Myapp.exe

My program expects to be in ..\Myapp\bin\Myapp.exe

I have tried making a shortcut and placing the shortcut at:
..\Myapp\Myapp.exe(shortcut)

though the launcher doesn't seem to recognize shortcuts.

Is there anyway to get the launcher to run a EXE that is not exactly:
..\Myapp\Myapp.exe

(for the record Myapp in this case is Maxthon 5 as I wish to use the current version not the version 4 that is available as a PAF. I have verified that Maxthon 5 works fine for me from the portal drive, if I manually browse and launch it, would be nice to just get a icon in the launcher itself)