Please try the new beta version:
http://rammichael.com/7-taskbar-tweaker#download

I checked 7+ Taskbar Tweaker v5.0 on Windows 7, and could not reproduce the issue.
Can you please try previous versions, and see which one worked?
https://www.dropbox.com/sh/mcbychsh0xc1dvu/8-Lj2sg3NP
Thanks.

Which version of the tweaker are you using?
In general, this error message means that the downloaded file is corrupt, probably because of a server error. In v4.5.10, the error reporting was improved, but perhaps it still isn't good enough.

Can you please upload the file in the path that is specified in the message box?
e.g. for the message box above,

C:\Users\SVANST~1\AppData\Local\Temp\stt6EC5\7tt_setup.exe

Thanks.

7+ Taskbar Tweaker doesn't have such option. You might want to consider changing your DPI settings.

Hi,

Thanks for the feedback.
I don't plan to implement the feature in the tweaker, because, well, it's 7+ Taskbar Tweaker. Having said that, there are programs which are designed to solve this issue. One that I'm aware of is WizMouse. I haven't used it myself, but as far as I know, it works as expected, and doesn't conflict with 7+ Taskbar Tweaker.

There's the "Drag within/between groups using right mouse button" option, which allows to move windows between groups.

You can hold Shift to get the other menu, as mentioned in the help file. For more customization, you can use the Mouse Button Control advanced options. See the help file for more details.

That's not possible. Please read the FAQ here.
As for CPU usage, it's nearly zero. The only thing the tweaker does in the background is checking for updates every 24 hours, if the option is enabled. Other than that, it's completely idle (except when you open the GUI or restart explorer).

Have you enabled the relevant option?