On some desktops, when I installed Eguide 4, the library list that was assigned at startup in EGuide 3 did not show up in Eguide 4. If this happens, one must click on Tools; SAS Enterprise Guide Explorer. Then, in that window, click on file; new; library and go through the window to create a link to each of the libraries that you want in your server list. Do not forget to check the box for "assign at startup" so they will always be there when you start eguide 4. Also, before you install EGuide 4, go to EGuide 3 and open the dataset VLIBNAM that is in your SASHELP library. This file will list all of your assigned libraries and their paths. Print out that list and you can use it to reassign all of the libraries in EGuide 4. I recommend that you install EGuide 4 BEFORE you uninstall EGuide 3 and, in most cases the libraries will carry over - but not always.