I have been using QB for 20 years. In the past I helped the tech support for solving some of the problems. Let me tell you something the freeze is a Quick Book problem and not a computer or Operating systems problem.

I suggest to intuit to work on fixing this problem otherwise they are going to lose many customers.  This freeze happen when you try import the .qbo files. I think they should work on the Rule list capability of exporting and importing the list to Excel or word or text file where some one will be able to do the editing in that tools or making the edit rule in quick book more flexible easy  where some can find and search and replace ... etc.