[lubuntu] Can't execute binaries, and can't open any file properties dialog

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http://ubuntuforums.org – Hello, I installed Lubuntu back in november (11.10) and recently updated to 12.04. Prior to some update, I have always been able to execute SublimeText and Aptana Studio, but now I can't. I just double-clicked the executable file and it ran, but now it just nothing happens. I tried to right-click the executable to open the file-properties dialog, but it doesn't open. (The dialog appears, but when clicking on the 'Properties' option nothing happens). I also tried to download filezilla, that it has the same extract-and-run "process", and it happens the same than with the (Hardware)