You should consider joining our Discord to ask for support.
We created a support channel using the new Discord Forum feature!
You can also visit our new website, it has a help section in English and French
If you go to Tools -> Options you might be able to configure the transparency color.If that changes the color you see in the editor, then you have no problem, you just need to learn how to map & how to use RPG Maker XP :)Tutorial on Youtube