edit: new version is correctly installed on an older XP / 32bit system. I can confirm the typo - during running of the installation program, version 2.0 is indicated, but finally version 2.1 gets installed.
However, when trying to install yesterday on the Windows 7 / 64bit system, I got a message that the version previously installed is newer than the downloaded version.
Shall I now try to reinstall the new version on the Windows 7 system or does it still need to be adapted?
weak point of the new version 2.1 (in my view): the colour in the upper window in the RSSI-field is not the same as in the lower window showing the spectra.