Release v2.2.2

[v2.2.2] – 2026-05-26

Upgrading from an earlier version? Total Commander keeps an
already-configured detect string when a plugin is replaced, so
users coming from v2.1.0 or earlier won't automatically pick up
the new universal file-type support — see
Upgrading from an Earlier Version in README.md.

Added

• Auto-fallback from quick to full mode for Office documents the
  preview handler refuses to render. Files synced from a SharePoint
  site in a non-primary Microsoft 365 tenant typically fail in quick
  mode with HRESULT 0x80004005 (E_FAIL) or 0x80004001 (E_NOTIMPL) —
  the preview handler's sandboxed surrogate process can't authenticate
  cross-tenant. This is an Office-side limitation that affects
  Windows Explorer's Alt+P / Preview Pane the same way; it isn't
  specific to TCOfficeView. When this happens TCOfficeView now
  silently retries the preview by launching the real Office
  application in the background (which runs as the user with full
  auth tokens and usually succeeds). Controlled per application from
  a new [AutoFallback] INI section — Word=true / Excel=true /
  PowerPoint=true (default for all three). Auto-fallback only
  kicks in when the application is in the quick-switchable mode
  (the default); explicit quick mode opts the application out.
  Mark-of-the-Web-blocked files keep their dedicated Unblock
  fallback panel — they are intentionally excluded from auto-
  fallback because opening them in the real Office app would
  bypass Protected View. See README.md → Configuration →
  Auto-Fallback for Multi-Tenant SharePoint Documents.
• User-initiated mode switch suppresses auto-fallback. When
  the user clicks the → Quick overlay button on a document that
  auto-fell-back to full at load time, the click is now treated as
  an explicit "I want quick mode here" instruction — auto-fallback
  is skipped so the click does not silently bounce the document
  back to full mode. Instead the quick fallback panel is shown
  (with an Office-specific explanation of why the preview handler
  refuses the file) and the overlay button flips to → Full so
  the user can return to full mode deliberately.
• Office-aware text in the generic fallback panel. For Word,
  Excel and PowerPoint files the "preview handler failed" message
  now lists the common causes (SharePoint cross-tenant sync,
  corrupted document, broken Office install) and notes the
  Explorer-Alt+P-parity behaviour. When the file's application
  is in a switchable mode, a → Full button hint is included.