Hi,
I've tested easysocial.stackideas.com using my setup Windows 10 > Explorer 11 and there does not appear to be an issue with writing to updates.
However on my site running EasySocial 1.4.5 and
http://ja-social-ii.demo.joomlart.com/index.php/en/easysocial
the issue remains.
I've granted permission for you to enter my development site.
Look forwarding to hearing what you find.
Cheers!