I can't reproduce your issue on my system. Refer to my short video below.

Moving forward, first, please try, uninstall Start11v2, reboot immediately (important), download latest version available in your account product download page:
https://store.stardock.com/myaccount/products. Install it, reboot immediately again. Retest it and report back.
Note: If I am looking at the wrong things. Please post a video showing us where and how you try to pin those folders etc.
Thank you,
Basj,
Stardock Community Assistant
I followed all of yours steps and no change. Moreover I performed a full clear unistall with Revo Unistaller and this time I did not made any chagne to the settings. The sychronize pinned items ... was On by default as you wrote to me above.
Edit: the Opera shortcut disappeared!!!
Edit2: I found a partial solution: when I right click on apps in start menu apps menu I have a new option to Pin in Start11 menu. But this is now existing in File Explorer icons' menu.
Edit3: Somehow sometimes when I move icons they are dissapeared!
Here are two video (gifs). If your browser do not show them as a video, click on each one and open them in a new tab (tested with Chrome) or download them.
Καρφίτσωμα στην Έναρξη = Pin to Start (Menu),
Ξεκαρφίτσωμα από την Έναρξη = Unpin from the Start (Menu)
Greek language
Please fix it, I want to buy your product, I am in trial now.

