You have to set only the logic rules for Long entry and FSB Pro will apply mirror rules for the short entries.

You can see the complete rule sin the Overview page.

And in Overview:

Logic

Opening (Entry Signal)

Open a new long position at the beginning of the bar when the following logic condition is satisfied:
  * the bar opens below Upper Band of Bollinger Bands* (Simple, Close, 20, 2.00).

Open a new short position at the beginning of the bar when the following logic condition is satisfied:
  * the bar opens above Lower Band of Bollinger Bands* (Simple, Close, 20, 2.00).

Closing (Exit Signal)

Close an existing long position at Upper Band of Envelopes* (Simple, Close, 14, 1.00).

Close an existing short position at Lower Band of Envelopes* (Simple, Close, 14, 1.00).

No, it is not possible. We use FSB Pro for modifying and testing the strategies because we think it has a better backtester.

A change in the logical rules may significantly change the behavior of the EA and without a proper backtest end robustness analysis it is too risky for trading.

You can test it in MT5.
You can modify the logical rules in the source code. You can also expose them in the input parameters, but you have to program this in the EA code. There is no option for that in FSB Pro.