export doesn't work

[pauline1234]

Export at higher resolution is not possible. Using Brushes Redux 3 on ipad2 and viewer 1.3.5 on mac high sierra. Messages: "viewer 32-bits is not compatible with macOS High Sierra 64-bits technology." And: "Brushes Viewer can't be updated when it's running from a read-only volume like a disk image or an optical drive. Move Brushes Viewer to your Applications folder, relaunch it from there, and try again." But it is already in the App folder, and relaunched. And: "Document could not be opened." Viewer can only open the included samples. Also, the older version v1 of the viewer offered on your site is actually the later version. In short, no useful export is possible. Please help.