I would like to follow up on this post and report on the further progress. Maybe this will help others.
After I successfully compiled HISE-scriptnote I got an error message after opening and exporting my project which I reproduced here:
...\binaries\source\plugin.cpp(30): error C2039: "getExpansionKey": Is not an element of
"hise::FrontendHandler" [C:...\Binaries\Builds\VisualStudio2017\My_App.vcxproj]
...\binaries\source\plugin.cpp(31): error C2039: "getExpansionType": Is not an element of
n "hise::FrontendHandler" [C:...\Binaries\Builds\VisualStudio2017\My_App.vcxproj]
This error was due to the fact that in Preferences I had not yet changed the HISE path from HISE-master to HISE-scriptnote.
After that the following error occurred (and it was rather a hard nut to crack):
hise-scriptnode\juce\modules\juce_audio_plugin_client\vst\juce_vst_wrapper.cpp
(95): fatal error C1083: unable to open file (include): "pluginterfaces/vst2.x/aeffect.h": No such file or
directory [C:...\Binaries\Builds\VisualStudio2017\My_VST.vcxproj]
It appears that "aeffect.h" is no longer included in the steinberg SDK because VST 2 support has been discontinued.
"https://www.steinberg.net/en/newsandevents/news/newsdetail/article/vst-2-coming-to-an-end-4727.html"
I don't know if there is another solution to the problem, but I was able to help myself with an archived version.
"https://www.steinberg.net/sdk_downloads/vstsdk367_03_03_2017_build_352.zip" (!)
After downloading just copy the unzipped folder VST_SDK/VST2_SDK_pluginterfaces and paste it into HISE-scriptnode\tools\SDK\VST3 SDK.
Then everything should work.