Hello, I have the same problem. I reinstalled WP SlimStat but still the same problem. I have also another problem, i do not have anymore WP SlimStat Dashboard Widgets, it is now disappeared.
I have checked the installation and some files and/or directories appear to be missing. The setting link is trying to access wp-admin/options-general.php?page=wp-slimstat/admin/options/index.php but that options directory does not exist.
See the content with the 2.9.5 version of the admin directory:
css/
geoip.csv
images/
js/
lang/
options/
swf/
view/
wp-slimstat-admin.php
wp-slimstat-custom-report-demo.php.txt
and this is the content with the new version:
config/
css/
geoip.csv
images/
lang/
view/
wp-slimstat-admin.php
As you can see no options now.
By the way, i haven’t been using the pluging for very long but it seems to be a great plugin. Thank you very much. I’ll give a review when i had used it for a longer time.