1. try running a search on your pc for jb4.exe.
2. or run task manager, and right click on jb4.exe when open and click open file location.
You will not find the file in your install files, those are just used for install. The installer puts it in your profile directory/AppData/Apps/2.0/ Then the directories are random, you need to use the taskmgr method to find the right folder