Initial release

PasteboardExplorer_HighSierra.zip is built on macOS Sonoma with Xcode 15.3 and target version 10.13, and is a universal app.

PasteboardExplorer_Yosemite.zip is built on OS X Yosemite with Xcode 7 and target version 10.10, and is an x86-64 only app.