As far as I know it hasn't been submitted for toleration by the developer, so if the developer of that tool is still here then he should submit it for toleration when he is ready

Exactly.

Developer has not submitted for toleration and because of that Foxgame is forbidden to be used.
Only tools which are on tolerated list can be used, you can find list of tolerated tools here:
Ogame Retro Universe - Tolerated Addons, Tools, Scripts & Skins