I performed procedures as follows:
1. in the /forum/language folder I uploaded the latest folder 'fi' replacing the old folder 'fi'
2. in the /forum/styles folder I uploaded the latest folder 'prosilver' replacing the old folder 'prosilver'
3. I emptied the /forum/cache folder leaving only index.htm (couldn't see .htaccess files)
4. I held down the shift key and clicked Refresh
5. I didn't see any new files?!! Should they appear in the /forum/cache folder?
Have I upgraded the style now? Should private messages work again? Is there a tutorial somewhere? When I upgraded from version 3.0.4 to 3.0.6 I followed the instructions provided by the automatic installation package and can't remember if I was instructed to upgrade the style.