[texworks] texworks crashes

[Ian Flood]

I have installed texworks but it freezes-up each time that I open a .tex file.
 
Any advice on this?
 
 
----- configuration info ----- 
TeXworks version : 0.4.3r858 (official) 
Install location : C:/Program Files/TeXworks/TeXworks.exe 
Library path     : C:/Users/ian/TeXworks\ 
pdfTeX location  : C:/Program Files/MiKTeX 2.9/miktex/bin/pdftex.exe 
Operating system : Windows Vista Service Pack 1, 32-bit 
Qt4 version      : 4.7.3 (build) / 4.7.3 (runtime) 
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