Grep for the win
Limitation of SuperMemo
SuperMemo search is limited to plain text and there is no suppor for regular expressions as searches are implemented using assembly language. That is not the end. You can overcome such limitation by using a third party tool and searching into the files externally.
GrepWin
grepWin is a simple search and replace tool which can use regular expressions to do its job. This allows to do much more powerful searches and replaces.
Download: GitHub