Firefox will not start when "firefox.exe" is typed in the start menu

I usually use Firefox 10.0a1 UX experimental build. I know it's "unstable", but it works just fine for me. Anyways, it was feeling slow today, and was constantly hanging, so I decided to run '''firefox.exe -safe-mode''' from the start menu. I got the error: '''The procedure entry point NS_SetDllDirectory could not be located in the dynamic link library xul.dll.''' When I looked at the task manager, it showed that Minefield (the old name for nightly builds) was trying to run. I didn't even know I had Minefield, as I reinstalled Nightly after they changed the branding (around 5.0-6.0 nightly builds). My question is: How do I change the default '''firefox.exe''' to point to '''C:\Program Files (x86)\ux\firefox.exe''' and/or how do I resolve that error?

I don't know about the error message you got but that is not the way to start a different version of Firefox -- include the pathname. And if you are trying to share a profile that is bad also as you could damage a profile, though Mozilla does try to avoid damaging, you should not mix the production version profile with one of a beta unless you are looking to create/solve additional problems for those that inadvertently do that. What does the UX stand for after 10.a1
Some links without reviewing them on my part
test using multiple profiles. See links at bottom as well like command arguments
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
Some more:
* http://dmcritchie.mvps.org/windows-7/win7.htm
* http://dmcritchie.mvps.org/icons/win7_quicklaunch_large.png
* http://dmcritchie.mvps.org/firefox/quicklaunch.htm
* http://dmcritchie.mvps.org/firefox/firefox.htm#launchy_notes
* http://dmcritchie.mvps.org/firefox/firefox.htm#launchy
Google:
Firefox The procedure entry point NS_SetDllDirectory could not be located in the dynamic link library xul.dll
http://www.google.com/search?complete=0&as_qdr=all&num=100&hl=en&q=Firefox+The+procedure+entry+point+NS_SetDllDirectory+could+not+be+located+in+the+dynamic+link+library+xul.dll&btnG=Google%20Search&sourceid=Mozilla-search

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