[1.0.1] exception in open dialog when selecting a folder which is not .sikuli --- fixed in 1.1.0-Beta2

[Precondition]
sikuli version:1.0.0
OS: Win7 64 ; Xp 32;
Procedure:100%

[Step]
Step1: Open the Sikuli IDE.
Step2: Click the File : select "open menuitem".
Step3: Select a folder which is not suffix with .sikuli.(If you use -debug -c run the sikuli ,it will print the error which is java.io.FileNotFoundException in console.)
Step4: Close the current IDE.
Step5: Open the IDE.

[Expect Result]:The IDE will run normal.

[Observer Result]: The IDE will not run. It will print a exception which is follow:
Exception in thread "main" java.lang.StringIndexOutofBoundsException:String index out of range:-1

solution: You must go to the PC----start----write :regedit
Go to :HKey_Current_User-----software----javasoft----Prefs---org.sikuli.ide---IDE SESSION(Clear it value or give a .sikuli folder path)