Aseprite v1.3.18.6 Released

Aseprite v1.3.18.6 is a small patch release focused on stability and export correctness rather than new features. The biggest fix addresses a crash introduced in v1.3.18.4 when pasting tilemaps, and tilemap copy/paste now behaves better across different layers and sprites, which should matter to anyone building tile-based workflows.

The update also fixes Sprite Sheet JSON export so user data line breaks are escaped correctly, avoiding malformed output in downstream tools or pipelines. A separate fix restores proper base64 encoding for certain brushes in the user.aseprite-brushes file, which should help preserve custom brush data reliably between installs or machines.

On Linux, X11 resizing and Ctrl+keyboard shortcut handling got attention, while the Lua API now correctly invalidates dialog display and contents after relayout. That makes scripted UI more dependable for tool authors and plugin developers. The release also includes build-script and Windows build-environment tweaks, but the user-facing impact is mostly in bug fixes and workflow stability.