Are you really sure that you are logged in as administrator? An administrator should have no problems with setting the directory to read/write.
>Hi,
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>It seems doesn't work.
>I forgot to say that the button "Save as default" in the Options form, remains disabled even if I make some changes to the values.
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>>The problem is maybe a space in the path name. Try to put it in another directory, you can specify it in Tools->Options->File locations