Open PDF after install

Hello Ulrich.
Hope you are well

The problem has been briefly described here however it was 6 years ago and probably something might have changed since that time...
https://forums.indigorose.com/forum/...n-adobe-reader

While in Windows 7 everything worked flawlessly, in Win 10 the Acrobat Reader does not want to open the file - instead, a process is created but nothing displayed.



--result = Dialog.Message("Notice", SessionVar.Expand("%ManualState%"), MB_OK, MB_ICONINFORMATION, MB_DEFBUTTON1);
if (SessionVar.Expand("%ManualState%") == "open") then
-- MANUAL PATH !!!!!!!!!!!!!!!!!!!!!!!!
File.Open(SessionVar.Expand("%AppFolder%\\Document s\\Manual.pdf"), "", SW_MAXIMIZE);
end
-- advance to the next screen
Screen.Next();


I have double'checked that the state is set as "open" indeed, so everything seems to be correct code-wise... Any help would be highly appreciated!