The incompatibility is fixed in the newly released beta version, 7+ Taskbar Tweaker v5.9.0.6.

Windows 10 Version 2004 with latest updates should be supported by 7+ Taskbar Tweaker v5.9. Perhaps you're using an insider version of Windows 10?

Can you please specify the version of your explorer.exe file? The latest version should be 10.0.19041.388.

That’s a false positive detection. False positives are unfortunately common for 7+ Taskbar Tweaker. Please see the FAQ here and this blog post.

I'm afraid that there's not much that I can do. From my experience, updating the tweaker only makes things worse, since new files are falsely detected by many antiviruses until they whitelist the new version.

You can try to contact the relevant company, SecureAge, and ask them to remove the false detection.

Thanks for the suggestion. It was suggested before, closing as a duplicate:

https://tweaker.userecho.com/topics/657-using-mouse-wheel-to-change-virtual-desktops-win-10

That's a known issue. Also see my comment here:

https://rammichael.com/7-taskbar-tweaker/comment-page-44#comment-11381

Indeed, the solution is to make the taskbar a bit wider than the possible minimum.

Do other options work for you?

Did you enable the corresponding option?

It's not that you can't pin store apps, you can. It's that the tweaker has issues maintaining order if there are store apps on the taskbar.

The tweaker tries to maintain the order of the items, but it's not always successful. One of the limitation is that store apps aren't supported. I don't recognize all of the apps on your taskbar, but I think the Outlook app and the phone app are store apps, right? Does the issue happen if you close them?

See also my comment here.