[GilB57]

I click the "Save map" and nothing happens...

I found a tutorial which helped me a lot... JUST ABOVE viewtopic.php?f=70&t=14643

Basically, to save your work, you should have in your game folder a folder named : Maps and in this folder, other folders with EXACTLY the same names than your maps folders in your mods/mapmods/maps/..
So, the work you do will be saved in this [your game]/Maps/[your map]/... but only the files which are updated in your work.
In order to to have the changes taken in account, you'll have to move files from
[your game]/Maps/[your map]/...
to:
[your game]/MODS/Mapmods/Maps/[your map]/...

It's the reason why it is better to have a separate dedicated install off the game (I deleted all paintshemes files from this install because they are useless there.
...so, no pb with JsGME .
NOTA: in order to avoid frequent crash of your mapmaking FMB, it is better to delete all .bumph & .tree.tga files inside _Tex folder (another VERY GOOD reason for a separate install : I just had a lot of crashes before I deleted those files...and don't worry about it : you just keep them in your regular install, and they are automatically used when you fly :wink: