Hi @mlekorlz!
We use “https-safe” WordPress API function called plugin_dir_url which should return https instead of http if site uses SSL.
However, can you please check what URL is set in settings in wp-admin? Is it http or https?
Moreover, can you check if you don’t have https://codex.www.ads-software.com/Editing_wp-config.php#WP_SITEURL or https://codex.www.ads-software.com/Editing_wp-config.php#WP_HOME set in wp-config.php without https?
The quick fix is to set WP_SITEURL and WP_HOME with https, please can you try if above two points are not valid?
In a meantime we are going to prepare workaround for cases like this one and release update shortly.