You can use the following link to install or upgrade the application.
Some more enhancements are coming your way.
This time, we’ve made it possible to share the generated document only with users within your organization’s domain.
Share the generated documents only with members of your organization.
Copy the Google Docs files from Google Drive to the defined record in Salesforce.

Here's the small one to follow up.
Added one very useful improvement that got squeezed out from the previous release.
In this release, we introduce the PowerPoint templates: create, enrich with Salesforce data, and generate.
Create the PowerPoint Document Templates, build the PPTX templates with Salesforce data inside, upload, and generate such documents as PDF or PPTX.
Add the PPTX format value to the corresponding picklists on the Document Template, Button Configuration, Document Request, and Action Request Objects in Salesforce Setup settings:
Add the PPTX format value to the Values picklist on the Template Type field on the Document Template Object
Open Salesforce Setup settings.

Navigate to the Object Manager tab and select the Document Template Object.

In the Fields and Relationships tab, select the Template Type field.

In the Values picklist section, click New.

In the opened page, enter PPTX and Save.

If you want to have all the Microsoft formats together, you can reorder items in the Values list by placing the PPTX format closer to other Microsoft formats.
Add the PPTX format value to the Values picklist on the Document Format field on the Button Configuration Object
In the Salesforce Setup settings, navigate to the Object Manager tab and select the Button Configuration Object.

In the Fields and Relationships tab, select the Document Format field.

In the Values picklist section, click New.

In the opened page, enter PPTX and Save.

If you want to have all the Microsoft formats together, you can reorder items in the Values list by placing the PPTX format closer to other Microsoft formats.
Add the PPTX format value to the Values picklist on the Document Format field on the Document Request Object
In the Salesforce Setup settings, navigate to the Object Manager tab and select the Document Request Object.

In the Fields and Relationships tab, select the Document Format field.

In the Values picklist section, click New.

In the opened page, enter PPTX and Save.

If you want to have all the Microsoft formats together, you can reorder items in the Values list by placing the PPTX format closer to other Microsoft formats.
Add the PPTX format value to the Values picklist on the Document Format field on the Action Request Object
In the Salesforce Setup settings, navigate to the Object Manager tab and select the Action Request Object.

In the Fields and Relationships tab select the Document Format field.

In the Values picklist section, click New.

In the opened page, enter PPTX and mark the Copy Document and Generate Document Actions.

Save changes.
If you want to have all the Microsoft formats together, you can reorder items in the Values list by placing the PPTX format closer to other Microsoft formats.
With this release we improved background processes handling Async server-client communication.
This small patch improves the After Merge Preview functionality.