Don't know what to say... it works for me. If it closes immediately it sounds like the IDE can't find ipecmd.exe, but if that's the case you normally get a "searching for ..." message when you try and program. Sitting in the folder where the hex file is located, try opening a command prompt and entering the commandline in manually and see what happens. You'll probably have to use the full path to the ipecmd.exe file, and enclose it in quotes if there are spaces in the path.

There's a step-by-step example of installing a PK4 using ipecmd.exe over on the Swordfish wiki at https://www.sfcompiler.co.uk/wiki/pm...rogrammingTool
It's pretty much the same basic IDE as MCSP except for how you get into the "add custom programmer" step