The solution to your issue is as follows.
Open in a text editor the file RTE_popup_link.asp and change line 157 to that below:-
vbCrLf & " if (hyperlink[i].getAttribute('href').search('" & strHyperlinkType & Replace(strHyperlink, "?", "\\?", 1, -1, 1) & "') != -1){")
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This should fix the problem with converting text to hyperlinks where
the hyperlink has a question mark and you are adding extra attributes
such as a target window.