Works fine for me.

Try this from the root of C:

DIR KIX32.EXE /S

Then remove any other versions of KiXtart and make sure you're ONLY running 4.52B2 as any other version will not work.
 
Try this and post the results please.

 
Break On
Dim $SO
$SO=SetOption('Explicit','On')
$SO=SetOption('NoVarsInStrings','On')
$SO=SetOption('NoMacrosInStrings','On')
 
'My KiX version is: ' + @KiX ?
RD "C:\New Folder\" /S
'remove folder error: ' + @ERROR + ' ' +@SERROR ?