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IDM released their editor and compare program in a PAF (non-U3) format today. I've tried the editor out out and am very happy with it.
The relevant page over on their website is:
http://www.ultraedit.com/products/mobility.html
From my standpoint, having a choice of RegEx engines alone has made this worthwhile.
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how can we download UltraCompare Pro as portable version? any suggestions?
After more than 10 years, the above link, surprisingly, still works. The 'PAF Version' , like all other available downloads is, initially, a trial version and a commercial licence has to be obtained for continued use, unless the user qualifies for a free (sponsored) licence, i.e. only available to students and/or educators for classroom use..
It is great to have the PAF format.
Yet it registers the editor system wide for many files.
So it is not really portable.