Find the 'addons' folder (usually on the Hard Disk) under '.kodi'. It is hidden so you will need to enable 'Allow Viewing Hidden Files'. Find all the folders within 'addons' that contain the name of your plugin and copy to a temporary location.
Now go down to 'userdata' & open it & also copy 'addon_data' to the temporary location.
Now go down to 'database' & open it & also copy 'Addons27.db' as highlighed in the following screenshot & copy to the temporary location.
Now copy all the files from the temporary location back into their designated locations (same places they we copied from on the old installation) on the new installation. Once completed all should work on the 'new' installation as before on the old.
Find the 'addons' folder (usually on the Hard Disk) under '.kodi'. It is hidden so you will need to enable 'Allow Viewing Hidden Files'. Find all the folders within 'addons' that contain the name of your plugin and copy to a temporary location.
Now go down to 'userdata' & open it & also copy 'addon_data' to the temporary location.
Now go down to 'database' & open it & also copy 'Addons27.db' as highlighed in the following screenshot & copy to the temporary location.
Now copy all the files from the temporary location back into their designated locations (same places they we copied from on the old installation) on the new installation. Once completed all should work on the 'new' installation as before on the old.