Reuse Kate Text Editor Instance; Open files reusing same window

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To tell Kate Advanced Text Editor to re-use any already open windows, do the following: 1. Right click on the file to open with Kate and select Properties > Open With tab. 2. In the new window, click the Add button. 3. At the bottom under "Use a custom command" type: kate -u %U and click Add. 4. Select the newly added open with application and Close the window. Now opening multiple files associated with Kate will re-use the existing window. The -u tells Take to open files in the same Kate instance. NOTE: or use '/usr/bin/kate' -u %U