Compatibility issues with ##1.3.x## version of freeplane.
1- LaTeX equations are identified as "FORMAT="latexPatternFormat" within the node info. We keep the "hook" option for backwards compatibility. Warning: LaTeX Format will be exclusivelly considered for formulas (it will create an "equation" environment).
2- Now there are more "hooks" because IMAGES can also be inserted as "hooks" therefore, the old equation filter "hook" has to be adjusted to the specific type "hook equation". Hooks with NAME=ExternalObject will be considered as images.