You can import your Clik 3 template into Clik 4 with the template editor, found under tools.
Go to File > Import > Clik 3 template(s).
Click the 'Browse' button to locate your Clik 3 template.
The default location for the V3 template is in the BMTemplates folder in BM > Clik.
Click the 'Convert' button to start the process. You will be prompted to select a logo file if the V3 template is linked to one.
Once imported open each of the imported templates and save it in the relevant category by clicking the save icon.
The templates that come with V4 will have the updated tag for V4 so you should only need to import bespoke templates created for Clik Service V3.