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Hidden Folder Extension

I have folders that have extensions, i.e. their names have dots:

folder.1
something.boo

For some reason, all folder extensions are now hidden. I can still see all file extensions, but not folder extensions. I tried checking and unchecking "hide extensions for known file types" but this only affects files, not folders.

How do I turn folders extensions visible again?
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acerola
Asked:
acerola
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1 Solution
 
ricks_vCommented:
most folders don't have extension, only files do. can you clarify what was the folder named before you lost them?
I'm assuming  it's a zip folder or rar folder. they should be like folder.zip for example.

Another possiblity, there are some folders being used by programs. uninstalling the program can result the folder with .xxx lose their name.

The only solution to this, is to rename the folder with .xxx as desired. "hide extensions for known file types" only work for files
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orangutangCommented:
Maybe try running:
regsvr32 /i shell32.dll
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acerolaAuthor Commented:
Here is a sample directory. On cmd, I can see the extensions (the full name with the dot and things after). On explorer I can't see anything after the dot. I only see several folders named "projeto1".
09/11/2008  02:57    <DIR>          .
09/11/2008  02:57    <DIR>          ..
08/26/2008  23:51            31,597 projetoI.pdf
09/10/2008  22:16    <DIR>          projeto1.5b
08/27/2008  23:55    <DIR>          projeto1.2
08/31/2008  18:59    <DIR>          projeto1.3
09/02/2008  23:38    <DIR>          projeto1.4
09/10/2008  18:37    <DIR>          projeto1.5a
09/11/2008  18:35    <DIR>          projeto1.6a
09/11/2008  22:32    <DIR>          projeto1.6b
09/24/2008  12:19    <DIR>          projeto1.6b implicito
               1 File(s)         31,597 bytes
              10 Dir(s)   2,454,552,576 bytes free

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acerolaAuthor Commented:
Here is a screenshot.
untitled.JPG
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orangutangCommented:
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acerolaAuthor Commented:
Thanks orangutang. I only changed this:

HKEY_CLASSES_ROOT\Directory

There was a string there called "NeverShowExt". I renamed it to "AlwaysShowExt". Restared explorer and all is fine now.

I wonder what caused this problem.
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