What kind of file is the "My Documents" folder

I am using 7 Ultimate.
Two days ago I was tempted to try I.E.9, D/L it but decided it wasn't for me.
Did the uninstall in "Add/Remove"
Later I realised that my yellow folders, from "My Docs" etc down to folders I'd gathered work in would not now open with left clicks, only with R click and "Open".
The message I get is
"This file does not have a program associated with it for performing these actions.
Please install a program or, if one is already installed, create an association in the default programs control panel"
how do I define my "yellow" folders in order to assign 'em to something that will open them with?
If I drag "My documents down to the taskbar and pin it to Windows Explorer then it will open from there with no problem.
I gather that Windows Explorer is the programme to link 'em to but how?

Thank you.
Yellow folders are as below.








I do not get an "Open with2 option, just "Open" which it does successfully.
a single file, like a WORD doc is easy, open with WORD but what type of file is a mixed folder?
I would assign 'em to Windows Explorer but don't know how

1) Go to regedit and navigate to the following key.

HKEY_CLASSES_ROOT\Directory\shell

In the right pane, what is the data under "Default"?

2) While you are at it, run a MBAM scan and an SFC scan.

SFC /SCANNOW Command - System File Checker

3) You can also try re-registering shell32.dll. Click Start>Run and copy & paste or type:

regsvr32 /i shell32

Click OK.
The spacing in the command is important.

Phew!
Did the scannow, twice actually as I forgot to add the command to show the log.
Still can't find the log but it said it could fix some but not all files.

shell32 didn't work according to the popup

MBAM showed nothing nasty

The registry showed






Sorry mate if i've done it wrong. Will the log still exist or do I try scannow again?
Where I stumbled was not knowing when to insert the "put log on me desktop" command. I did it after scan finished.

What about going back to I.E.9 and just fixing the bits I didn't like.
Do you think it might re-assign the folder opening?