Download the latest version, I think there is an option at apperance.
Otherwise try this
Download Startdock curtains (you can use the trial version for 30 days no need to buy it)
You can go to the gallery of the user niivu on DeviantArt and download his Windows 11 theme for Windows 10. In addition to offering a complete theme pack that you can install without having to modify system files, it also offers a couple of themes to use specifically with Curtains that round the edges in Windows 10.
All you have to do is install Curtains and then download the theme from niivu. Then itās up to you to extract the ZIP of the theme you downloaded from DeviantArt and find the folder called āStardock Curtainsā.
There you will find two files called windows 11 light.CurtainsStyle and windows 11 dark.CurtainsStyle. Double-clicking on each of them will add them to your list of Curtains themes.
From there it is just a matter of double-clicking on the theme you want to use and you will immediately see how the edges of your windows become rounded. Unfortunately, this doesnāt apply to floating menus as well.
I have found this but haven't tested.
Make a backup of your registry first.
To customize your OS, you will need to: use the "Search" and use it to open "regedit.exe":
- Go to the section in the following path "HKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Search \" ā in the last subsection, go to the window to the right and use the right mouse button to call the context menu with which you can create the "DWORD 32 bits āā the parameter to be created must be set to the nameā ImmersiveSearch ā, and the value must be set as ā1ā.
- Go to the section under the following path āHKEY_CURRENT_USER \ Software \ Microsoft \ Windows \ CurrentVersion \ Search \ Flighting \ā ā create the section āOverrideā ā go to the window to the right and use the right mouse button to open the context menu create the āDWORD 32 bitsā parameter ā the parameter to be created must be named āCenterScreenRoundedCornerRadiusā, and the value must be specified as ā9ā.
- After the done settings in the OS, you need to reset the device. As soon as your PC starts up again, you can notice that you have managed to make rounded corners in Windows 10 and now the system workspace is very different from what you used to see in everyday life.