> 1) What is the difference between “Close and Reverse” in “Next opposite direction signal” menu?

“Close and Reverse” is an indicator for the "Closing point of the position" slot. It defacto makes the strategy working with entry rules only. On the other hand "Next opposite direction signal" provides the same behaviour for the entry signals, but you may also use various exit rules.

Please think for it as follows:
When "Next opposite direction signal" is "Nothing", the strategy opens according to the entry rules and closes according to teh exit rules.
When "Next opposite direction signal" is active, the strategy acts as above, plus it may close, reduce or reverse position as per the entry rules during an open position.

Here is the full explanation: Strategy Properties

> 2)    In the Generator there is a possibility to choose “Generate Additional Entry Signals

when the option is on, the Generator may change the behaviours selected in the Editor. when the option is switched off, the Generator doesn't change what you have chosen in the Editor.

Here is the Generator help: Strategy Generator