This is not an ObjectARX question. You should better ask the technical support.
I have no idea why acexperience.arx is crashing on your side. I would suggest to re-install AutoCAD.
It seems that AutoCAD can live without acexperience.arx. I've just renamed my ARX and AutoCAD started without complaints.
You could try the same to make sure that the problem is really within acexperience.arx.
acexperience.arx was loaded upon startup on my machine as well - I don't know why. Looking into the registry I found
HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\R22.0\ACAD-1001\Applications\AcExperience
LOADCTRLS = 0x0c <-- meaning "load at start of a command" and "at request of a user or another application"
Commands = DESKTOPANALYTICS
Maybe AutoCAD runnig without acexperience.arx is better than non running at all.
But even if DESKTOPANALYTICS is the only user command that acexperience.arx implements it has a bunch of exported functions. So just renaming it is NOT the ultimate solution!
Thomas Brammer ● Software Developer ● imos AG ● LinkedIn ● 
If an answer solves your problem please [ACCEPT SOLUTION]. Otherwise explain why not.