zxspectrum4.netは安全ですか？

I wanted a Spectrum emulator that was easy to install and use, and 'ZX Spectrum 4 .net' emulator seemed to offer that, but when I down loaded the zip file and launched the ZXSpectrum4.exe file it wanted a activation code. So I checked out the included Readme.txt file in the .zip file and found this line "No registrsation for personal use." But then I checked the On-line help 'www.zxspectrum4.net/help' and found this line "NOTE: The menu and tape buttons are disabled in the free unregistered version of the emulator, to activate the advanced functionality please help support the project by registering, it is only £10!" I don't believe the site untrustworthy, but it is misleading. As always read everything before wasting your time. I will look else where.