1. Unfortunately no. You need to configure your css file again, after reinstalling the component. You can not use CSS file from LIGHT version for PRO version or for Iprice minimart version.
2. You can change the date format in your Joomla language file: /language/xx-XX/xx-XX.ini,
variable DATE_FORMAT_LC4, where xx-XX - the abbreviation of your language
3. Unfortunately no. At the moment you can use re-Captcha only.
