Step 1. Click on "LIBRARY".
Step 2. Right-click on "DCS WORLD".
Step 3. In the context menu, click on "Properties".
Step 4. In the "Properties" window, select the "BETAS" tab.
Step 5. Click on the down arrow right of BETAS drop-down list.
Step 6. Click on "final-32bit-1.2.16 – The last 32-bit version."
Step 7. Click the "Close" button.