Fix MonoTouch install? - xamarin.ios

My MonoTouch install is screwed somehow (MonoDevelop won't even open).
So yesterday I deleted /Developer/MonoTouch off my Mac because that was the only directions I could find for uninstalling it. Today I tried reinstalling both it and MonoDevelop. Both installers ran fine, but I still have the same issue so I went to "uninstall" it again...and that directory doesn't exist this time.
Then I went to install an older version (2.6.7) and that installer tells me that I have a newer version already installed.
So....what do I do?
I am in a very, very bad mood because of all this right now. A months worth of work is now pointless unless I can get this running again.
EDIT
I finally got an older version of MonoTouch to install. Version 2.6.7 that was downloaded off of their site. Now when I run MonoDevelop I get an error that says "MonoDevelop requires the Mono Framework version 2.6.7 or later" and gives me the option to "Cancel" or "Download".
This is the error that I got that started this whole thing. I installed 2.6.7 but it doesn't recognize, and if I install 2.8 it just won't launch (icon bounces 3 times then does nothing, no error, no app).
EDIT 2
The other thing of note is that no matter how many times I install/uninstall/reinstall any version of the Mono Framework, nothing at all shows up in /Developer/MonoTouch.
I don't know how important that is, but considering something used to be there until this problem started I thought it worth mentioning.
Also since this problem started, I can no longer open any .xib files inside of Interface Builder. Whether that means one created in XCode or opening Interface Builder then creating a new View. Interface Builder runs fine, but as soon as I try to open any .xib it crashes with this error report.
I notice it says something about libxml2 in there which WAS installed yesterday and is probably the root cause of this...but I have uninstalled and reinstalled that as well with no luck.

You need to install Mono 2.6.7 or later, please download and install:
http://ftp.novell.com/pub/mono/archive/2.8/macos-10-x86/10/MonoFramework-2.8_10.macos10.novell.x86.dmg

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Since then, I have been unable to uninstall, repair or reinstall Node.JS, through the Windows 10 uninstall function or from the Node.JS .msi file.
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Do these:
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Restart your PC when the scan is done.

What versions of Angular 2 and Angular-cli worktogether on windows vista?

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I'm having a bit of a problem here. I attempted to update angular/cli and I got errors telling me I need to update my version of node. I have windows vista so I'm pretty much stuck with node 5.7 and npm 3.6 until I can afford a new computer.
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To make my life easier in the future, I created a script file to do this any time I started Eclipse. This is a simple text file with the executable flag set.
#/bin/bash
export GTK_IM_MODULE="ibus"
~/Programs/eclipse/php-2019-03/eclipse/eclipse
I hope this saves others a great deal of searching.

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