thanks. URL capitalization options include:
capitalize first letter, like: /33567/New-plugin-url-customizer
capitalize all words first letter: /33567/New-Plugin-Url-Customizer
capitalize all words, like: /33567/NEW-PLUGIN-URL-CUSTOMIZER
I personally see no point in using this option, but it had been requested before, so I added this feature to plugin.
also it's easily possible to add a code to this plugin to check post's date and apply customizations on new questions. but changing question URL doesn't damage Q2A site's SEO and won't generate any 404 errors. so I decided to keep plugin simple and not add this feature.