Hello,
Thank you for contacting us regarding this issue.
I have determined that there is a issue that prevents the scheduled task from running correctly.
I have resolved the issue with this quick update if you want to test it out.
https://oss.azurewebsites.net/testr/dev-builds/ffxp4.3.0.1937.zip
Just unzip the flashfxp.exe into the FlashFXP program folder.