Problems with add-on after Chrome cleaning

Hi, after the release of version 5.18 I started having problems with the cleaning of Chrome. Missing setup of some browser add-ons that are stored in the folder ".. \ Google \ Chrome \ User Data \ Default \ File System". This problem is apparent when you use add-on "Visual bookmarks Yandex".
I propose exclude the folder ".. \ Google \ Chrome \ User Data \ Default \ File System" from the surveillance program.
Thank you.