Browse to your flashfxp folder and right click on the flashfxp.exe, from the popup menu select Properties, then click the Digital Signatures tab, Select IniCom Networks and click the Details button. Directly below the "Digital Signature Information" text it should display "This digital signature is OK".
If you do not see this information please re-download FlashFXP from our website at
https://oss.azurewebsites.net/download.php