When updating the battlelog plugin battlelog-web-plugins_2.6.2_154.exe many find the plugin will not update;

Chrome users will need to perform an additional step since Google recently disabled all NPAPI based plugins within Chrome (e.g. the one used by Battlelog)... You can workaround this using the following steps: 
  1. Browse to this URL via the address bar: chrome://flags/
  2. Locate "Enable NPAPI"
  3. Click Enable
  4. Restart browser 
The alternative solution is using another browser such as Internet Explorer or Firefox.