Calculator for Flight

Calculator for Flight:
The calculation of time, as well as commonly used in the calculation of the flight.In particular non-precision approach (VOR/DME, NDB/DME, LOC) for the descent profile calculation, making a more accurate non-precision approaches.
It's free to get registration key. I would like to know how many people use this software.
If you don't want to register, just click "continue", no function limitation.
To Registration:
1.Figure 1, fill in the registration information.
2.Click "GetKey" to get key automatically,
3.then "Continue".

60进制计算器：主要用来累加飞行记录本中的飞行时间。
飞行计算器：提供60进制计算，以及飞行中常用的计算。 特别是非精密进近(VOR/DME,NDB/DME,LOC)的下降剖面计算，使得非精密进近更加准确。
注册是免费的。我只想统计一下有多少人使用这个软件。
注册方法：
1.如图1，填写注册信息。
2.点击"GetKey"获取注册码,
3.然后"Continue"。