Thank you, Andrew! Another small suggestion for the README - perhaps add a small section about deleting OLD copies of this mod (circa 1.3.8 - such as version 2.1.0, which was around for a number of years). It would be as follows:
a) Delete the following files from your admin directory:
./includes/boxes/extra_boxes/googlesitemap_tools_dhtml.php
./includes/extra_datafiles/googlesitemap.php
./includes/languages/english/googlesitemap.php
./includes/languages/english/extra_definitions/googlesitemap.php
./includes/languages/italian/extra_definitions/googlesitemap.php
./includes/languages/italian/googlesitemap.php
./includes/languages/russian/googlesitemap.php
./includes/languages/russian/extra_definitions/googlesitemap.php
./googlesitemap.php
b) Run the following SQL in admin->tools->install SQL Patches:
SET @configuration_group_id=0;
SELECT (@configuration_group_id:=configuration_group_id) FROM configuration_group WHERE configuration_group_title= 'Google XML Sitemap' LIMIT 1;
DELETE FROM configuration WHERE configuration_group_id = @configuration_group_id AND configuration_group_id != 0;
DELETE FROM configuration_group WHERE configuration_group_id = @configuration_group_id AND configuration_group_id != 0;