Chrome - Could not move extension directory into profile

AntDm was installed in Chrome and working properly. I installed Phoenix 360 on my machine and the AntDM extension disappeared from Chrome. I tried dragging the antCH.crx file into extensions and clicked add extension then I got the message "Could not move extension directory into profile". Any help would be appreciated.

Currently we are experiencing problems with the Google WebStore.
Until WebStore unlocks our extension or suggests ways to solve the problem, we can not help our users.
Thank you for your understanding!

I believe I have found the problem and corrected it. When I installed Iolo Phoenix 360 it came with a malware killer. The malware killer thinks DLHelper is malware and removes it from Chrome. I have now set it to exclude DLHelper as potential malware. I think and hope that has fixed the problem.