You have not purchased 1C Bitrix. Do not rush to do this. 1C Bitrix is already included in the price of the template (edition - Business, release - 16.0.12). it fully working version only with the expired Standard License.
We guarantee smooth operation purchased from us 1C Bitrix. Otherwise, we will refund your money. Read more...
Please note that you can continue to use the product under the terms of the “Limited License” no time limit.
Details can be found in «License Agreement» clause 6.2. (link to the official website "1C Bitrix")