Checkbox for Post Types in widget

Hi all! Hope u r having a great day.
currently i am able to select all post types or any single post type from the wp postratings widget’s dropdown select option. but suppose if i want to select any two custom post type then it,s not possible to do so with single select dropdown, how about having multi-select 0r checkbox type select there. The plugin is really helpful, i don’t want to switch to other plugin. Please let me know if u r adding this in next update. and any other kind of quick fix is also appreciated.
Thanks in advance! ??
Plugin-> https://www.ads-software.com/plugins/wp-postratings/