Windows Theme Manager 2.03 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Windows Theme Manager is included in Desktop Tools. We recommend checking the downloaded files with any free antivirus. This free tool was originally produced by Thoosje.
From the developer:
Theme Manager is a “One Click” Windows 7 Themes manager designed to help you install and manage Windows 7 themes. The Theme Manager comes with its own database that lets you connect in real-time to Thoosje.com themes database containing hundreds of professionally designed themes for Windows 7.
You may want to check out more software, such as Windows UAC Manager, Windows 10 Manager or Window State Manager, which might be related to Windows Theme Manager.
System Tools
File Managers