Please post different questions via separate topics, next time – https://www.8theme.com/forums/xstore-wordpress-support-forum/
1/ No, unfortunately.
Request about adding new functionality you can post here – https://www.8theme.com/taskboard/
2/ Our theme or WooCommerce plugin does not have filter by category widget. There is only Product categories list widget.
If you need filter by categories you need to look for the third-party filter plugin that has such filer widget.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.