Like foxglove I have 2 computers, both running the latest Windows 10 Pro version. On the older one PDF24 works fine.
On my new computer I have the same problem as described above. Not only do none of the tools work but also the 3 options at the bottom of the screen do not function. These are "About PDF24 Creator2, "Check for updates" and "Settings".
I do recall that when initially installed (April 2021) it worked fine. But now it doesn't work, possibly as a result of a Windows update? However my older computer has received the same updates.
Any suggestions would be appreciated.