Sometimes Word will disable Add-ins, and you will need to re-enable the Valcre Add-in. The following steps will get it re-enabled back into Word for you:
1. Go to File -> Options
2. Click on Add-ins
3. Next to the Manage options at the bottom of the window, select Disabled Items and click Go...
4. Select Valcre in the list and click Enable
5. Then click Close and then OK

If your Datalink Add-In has disappeared after a Microsoft update and you're receiving this error (see below) when you try to re-enable Datalink, please follow the steps below:
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1. Open File Explorer and type 
into the address bar (Replace 'Usuario' with your Username) then hit Enter.
2. Delete the folder that appears - '2.0' - and then close the window.
.png?width=688&name=mceclip3%20(5).png)
3. Next, hit the Windows + R keys to open up the Run window. Type 'cmd' and hit OK.
4. Copy & Paste rundll32 dfshim CleanOnlineAppCache into the window as shown below, then hit Enter.
.png?width=688&name=mceclip4%20(2).png)
        
      