We started rolling out SAP 7.30 GUI Final 7300.3.7.117 out to people, and we've ran into this error with people who had upgraded from SAP GUI 7.10.
Our environmental variable uses saplogon.ini (SAPLOGON_INI_FILE) and points to c:\windows\saplogon.ini
I don't know why the program is trying to search for saplogontree.xml.
I've tried uninstalling, rebooting, reinstalling. Deleting some of the %appdata% SAP folders.
I need some guidance as people who upgraded from GUI 7.20 do not run into this issue.