problems with build a chrome thinapp

I have several problems when I used thinapp 5.0 to build a chrome thinapp on win7 x64.

1. chrome’s icon doesn’t show in taskbar. Same as  https://communities.vmware.com/thread/471046?start=0&tstart=0
2. The folder of current woking directory has been appeared in Sandbox when chrome thinapp was running.
3. Can’t install any extension.

Show "Can not unpack extension.  To safely unpack an extension, there must be a path to your profile directory that starts with a drive letter and does not contain a junction, mount point, or symlink. No such path exists for your profile." error message. use -no-sandbox?

4. The folder of current woking directory has nest many times. So the path in sandbox is too long.