If TagMarkets 5 on Windows isn't working, please follow these steps to reinstall the program:
Open the Terminal and click on "File" on the left, then select "Open Data Folder".
This action will open the file explorer. In the top navigation bar of the file explorer, click on "Terminal" to go one step back, but keep this window open.
Close the Terminal and uninstall the program.
Return to the file explorer window you left open and delete all files in the "Terminal" folder.
After completing these steps, reinstall the program, and everything should work again.