Login to your Office 365 admin center page with administrator account, then choose Admin
Go to SharePoint Admin Center
Or in the new admin center
Select Apps then Click on App Catalog
Open Apps for SharePoint
Upload ShortPoint Online App new version (ShortPoint.Online.app)
Extract the zip file you downloaded you received from shortpoint.com, and you will find ShortPoint.Online.app
Note: if you requested to download the Offline Add-In, the file name will be ShortPoint.Offline.app
Important: You should have one ShortPoint file uploaded to the app catalog at all times
You should have noticed that the version number increased.
Now you have to open the sites where you added ShortPoint App and start the updating the app on the sites. We will make this process better and easier in the upcoming releases.