DxWnd's goal is to work without any impact on the operating system or the target programs, so the only thing you need to do in order to uninstall DxWnd is to simply delete the folder where you copied its files.
Neverthless, there are a very few optional and advanced features that you should be aware of that have a limited impact on the operating system and the target programs. This page is giving directions to completely delete any trace of the presence of DxWnd on your system, just in case you may want it.
But in any case, omitting to perform these suggested cleanup actions will not endanger the correct system behavior in any way.
DxWnd menu command Tools > Export files > Associate creates a permanent association between the ".dxw" file extension and DxWnd. This association is written in the system registry. If you remove or move "dxwnd.exe" to another folder, a broken association will remain in the system. To clear it, you have to use the menu command Tools > Export files > Disassociate.
DxWnd can be set to automatically run at system startup through the startup setting "Run at startup". Also this setting is written in the system registry. Before deleting or moving DxWnd, you could uncheck this option to prevent Windows from trying to run a missing program.
When logging is enabled, the target program will write one or more log files in the game folder. The file name will depend on the logging options, but in the most typical cases, it will be "dxwnd.log". These files are overwritten at each program start, but never deleted and could take quite a lot of hard disk space. It is recommended to search and delete these files when they are no longer required.
DxWnd can install proxies to take effect permanently on an application when DxWnd is not running or installed. If you have installed proxies, remember that they will work until they are deleted (right-click on the DxWnd entry and click on Proxy > Remove).