Yes. Read the manual that comes with KiXtart(or at least search it for the function you're trying to perform). You will find a list of functions and their use and syntax. Sorry, I didn't test the code, just cleaned up your original code to the best of my ability.

My EXIST syntax was wrong.

After Reading the manual I found that the syntax is correct as follows:

Code:
 
If Exist ($mapir + "mapir.dll")
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let the wise listen and add to their learning,
and let the discerning get guidance- Proverbs 1:5