Install the software - Windows
It is recommended you uninstall any previous version of TVPaint Animation you may already have on your computer before proceeding. To do so, open the Windows Control Panel and access the Uninstall Program utility. Then, proceed with uninstalling TVPaint.
Once TVPaint has been downloaded, unzip the ZIP file from your Downloads folder and open the extracted TVPaint Animation folder.
It is strongly recommended to keep this installation folder with all its files. It contains the software installer, the End User License Agreement and the After Effects import script file.
Double-click on the .EXE file called TVPaint Animation […].exe, then follow the instructions of the installation program:

Make sure that all of the installation components are selected. Then resume the installation:

The installation should then complete without any issues:

An application called CodeMeter will also be installed with TVPaint Animation automatically. CodeMeter manages your license and allows the software to run. It is necessary to install it in order to activate your license and for TVPaint to launch.
Do not download and install CodeMeter from another source as you could then be using an incorrect version of the application (which may prevent TVPaint Animation from working properly).
Once the installation is complete, proceed with activating your license.