make Sigil’s external XHtml editor work to pass an OPF file (see PageEdit new features).

properly warn users if a multiple rendition epub (multiple OPF files) has been loaded.

properly update the ncx after merging xhtml files.

enable use of SIGIL_DEBUG_LOGFILE environment var to control saving debug output to a file.

removed use of Qt obsolete methods in About and Error Dialogs.

fix improperly disabled open-with menu in Image Tabs popup context menu.

all error messages are now properly logged.

fix Windows 7 issues when running batch (.bat) files via OpenExternally (open with).

hopefully fix macOS segfault on close by disabling Preview timer immediately.

fix macOS bug when hitting close on the title bar of MainWindow causing strange window behaviour.

create GetEnvironmentVar to make access to environment variables more cross-platform.

fix local links during split that incorrectly used target filename for internal link.make sure JQuery gets loaded before starting to use Preview javascript functions.

hopefully fix macOS bug about launching files using open-with from Desktop.fix bug in macOS that caused spurious warnings about missing file in the manifest.Sigil-0.9.18 represents a mix of new features and bug fixes. For the impatient, the installer files (and source) can be found as assets at the bottom of the Sigil Github Release page.

Sigil 2.0.1 instal the new for mac