multiple edit files with ultraedit opens two processes

Hi,
I have my editor setup as ultraedit
when i click "Edit" on a file, it opens in ultra edit it works fine.
but if i then want to open another file at the same time, it opens a completely seperate ultraedit window, it never used to do this it used to open a new tab within ultraedit, does anyone know if this is an issue with winscp or ultraedit?

Thanks
Rob

You may have enabled that in UltraEdit configuration. Please read documentation.