That's easy because the Uedit32.ini and the Uestudio.ini are nearly 100% compatible. UEStudio has some settings, which UltraEdit does not have but they are no problem.
First rename your current Uestudio.ini. It should be in your personal application data folder which is by default a hidden folder, so enable Show Hidden and System folders in Windows Explorer before search for it.
Next copy your Uedit32.ini to the directory of Uestudio.ini and name it Uestudio.ini. Open this Uestudio.ini with UltraEdit and adjust following setting according to the value in the original and renamed Uestudio.ini.
Then correct all path and file specifications in Uestudio.ini.
Note: You could use the same wordfile for UltraEdit and UEStudio. Simply do not change the path to the wordfile of UltraEdit in UeStudio.ini. UEStudio and UltraEdit have 100% identical wordfiles after installation. But take into consideration the wordfile then is only updated when you update UltraEdit. If you have modified the standard wordfile you should copy it for example to PersonalWordfile.txt and use this wordfile for both programs to avoid problems during updates with your personal wordfile. It's a good advice to compare wordfile.old and wordfile.txt after an update of UltraEdit or UEStudio and check what have changed to propably apply this changes also to your PersonalWordfile.txt.
Save Uestudio.ini, close UltraEdit and start UEStudio. UEStudio will automatically add it's special settings which UltraEdit does not support and all other settings should be unchanged.
That's it. In the registry no important settings are stored, if you do not have specified to save all settings in the registry instead of the ini file.