[plt-scheme] 207 install issue on Win XP (206 vestiges)

I installed 206 in c:/cygwin/home/metaperl/install/PLT

I de-installed 206 and then downloaded and installed 207 in C:/Program 
Files/PLT

When 207 attempts to start up, I get this error message:

The teachpack file 
C:\cygwin\home\metaperl\install\PLT\PLT\teachpack\htdp\convert.ss did 
not load properly.
current-load-relative-directory: directory not found or not a directory: 
"C:\cygwin\home\metaperl\install\PLT\PLT\teachpack\htdp\"

It is a fact that the stated directory does not exist because it was 
removed during install. But why would 207 be looking for teachpacks in 
the 206 install directory and what can I do to rectify this situation?

-- 
  (let recur ((lis x) (k k)) 
    (if (zero? k) (values '() lis) 
	(receive (prefix suffix) (recur (cdr lis) (- k 1)) 
	  (values (cons (car lis) prefix) suffix))))) 

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