When you install UFT select the "update a previous version" option. The install program will search your disk(s) and find your ROOTS IV installation and ask you If this is the one you want to update. Answer yes, and go through the rest of the installation. When it comes to opening your project(s) the first time identify them as ROOTS IV projects; you will find them in the directory in which you had ROOTS IV.
If in the future you wish to have the directory name "UFT" as opposed
to "ROOTS4" (or whatever you had) then all you have to do is change the
name of the directory. Unlike earlier versions, UFT when next opened, will
automatically find your project and library files in its UFT directory.
There is one exception to this - the REVENT library will not have been
renamed. However, when you first have occasion to use the REVENT library
you will be asked to point to it - and it will be displaying it in such
a manner that it will be easy to click on.