If you cant update my modpack normally follow these steps:
1. Backup your Worlds.
2. Click on "Delete Modpack". This will remove the modpack from your pc.
3. Search "welt101`s Modpack" and click on "Install Modpack".
4. Now you have the last version.
If you need more help, you can visit my website: www.welt101modpack.jimdo.com .