Force update the app
This guide will tell you how to force update the FTB App on overwolf.
Open Overwolf by going to the start menu and searching for Overwolf.
Click the settings cog in the top right as highlighted in the image below
Click Development Options
Click on Update Extensions now and wait a few minutes.
If there was an update for the FTB App after a few minutes at most (depending on your download speed) you should see the version number next to the FTB App (highlighted below) change.
Congratulations your FTB App is now up to date.