I am running Photo Mechanic version 4.6.3 and I run Win 7 64-bit on my Lenovo laptop.  I am trying to replace a hierarchical keyword separator ';' with '|' and everytime a run the 'Find' or 'Find'Replace' PM crashes; the dialog window header indicates 'not responding'.  The folder that I'm searching has about 20,000 images in it.  Is the folder too large?
Thanks in advance for your help.
Jerry