Version 3 is Messing with my Javascript width

I have javascript on my homepage, with a custom width set to 640px and when this new version of the RSS Multi importer is activated, it now deactivates that width. The javascript goes back to its default width.

When I deactivate this plugin, the javascript returns to the 640px like I wanted. How do I fix this?

https://ww.wp.xz.cn/plugins/wp-rss-multi-importer/