Problems with sitemap.xml files

I have been trying to create a sitemap.xml for Google.
There have been various problems.  
I tried to solve these by trying different software and the result is
a real conflict and frankly a mess of files I do not know what to do with.
I would like to erase everything and start again.
But I am concferned about deleting files in case I delete something that might either
A.  Mess up the operation of my site
or
B. will prevent ANY sitemap being created.
I think most of these files have been created by xml-sitempa.com
It looks good software but the support is lousy.

Can an expert please tell me which of these files in the different directories listed below that I can delete SAFELY to start again.
Thanks


/public_html/custom/domain_2/generator/pages/mods/sitemap_notify.txt
/public_html/custom/domain_2/generator/pages/mods/sitemap_index_tpl.xml
/public_html/custom/domain_2/generator/pages/mods/sitemap_xml_tpl.xml
/public_html/custom/domain_2/generator/pages/mods/sitemap_base_tpl.xml
/public_html/custom/domain_2/generator/pages/mods/sitemap_ror_tpl.xml
/public_html/custom/domain_2/backup02192013/tmp/min_sitemapphp_88048206426.js
/public_html/custom/domain_2/backup02192013/tmp/min_sitemapphp_22012051606.css
/public_html/custom/domain_2/backup02192013/sitemap
/public_html/functions/sitemap_funct.php
/public_html/functions/sitemapgen_funct.php
/public_html/cron/sitemap.php
/public_html/where-to-online-shop/tmp/min_sitemapphp_142012095446.css
/public_html/where-to-online-shop/tmp/min_sitemapphp_426036286338.js
/public_html/generator/data
/public_html/generator/pages
/public_html/generator/changelog.txt
/public_html/generator/default.conf
/public_html/generator/documentation.html
/public_html/generator/howto-install.pdf
/public_html/generator/index.php
/public_html/generator/license.html
/public_html/generator/runcrawl.php
/public_html/generator
/public_html/generator/pages/page-generator.inc.php
/public_html/custom/domain_2/generator
/public_html/custom/domain_2/generator/pages/page-generator.inc.php