MD Viewer 1.3.1 — scrolling fixed, mode switcher visible

MD Viewer 1.3.1

Fixes two things you could see immediately: the rendered page no longer goes blank once you scroll past the first screen, and the Rendered / Source / Editor switcher is actually visible in the toolbar (it was created but never added to the panel). The installer also stopped interrupting “Installing…” with a dialog about the per-user .md choice — that note is now on the Finish page.

Install: MD.Viewer-1.3.1-setup.exe (34.8 MB) → C:\Program Files\Deynekin\MD.Viewer. Portable: mdview.exe.

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[1.3.1] — 2026-11-09

Two bugs found by installing and using the product, both visible in the first minute.

Fixed

• Scrolling past the first screen left the page blank. DocumentView applied the scroll offset
  twice — once as a transform and once inside MarkdownRenderer.PaintContent, which also does the
  viewport culling. The culling then measured the wrong slice and stopped painting every block below
  the first viewport. The offset is now applied in one place. Verified with captures at 0, 700, 1500
  and 2400 px: 22 683 / 23 671 / 15 126 / 16 027 inked samples instead of an empty page.
• The three-mode switcher never appeared. ModeSwitcher was created, themed and positioned but
  never added to the toolbar's control collection, so Rendered / Source / Editor was invisible since
  the first release (the shortcuts and the menu still worked). Now it is added and sits centred.
• The installer no longer shows a modal message during “Installing…”. The per-user .md choice
  note is appended to the Finish page instead of interrupting the progress page with a dialog that
  looks like an error.