Inno Setup 6.5.2 released

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Martijn Laan

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Sep 10, 2025, 10:27:50 AMSep 10
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Hi everyone,

Inno Setup 6.5.2 has been released.

Highlights are:
  • Increased the maximum size for a single Setup.exe to 4 GB, which is the maximum Windows supports.
  • When disk spanning is enabled disk slices no longer have a maximum size.
  • Added support for using .png wizard images.
  • Added support for TLS 1.3 downloads and RAR5 archive extraction.
  • The Compiler IDE can now auto reload modified files, improving integration with tools like Claude Code, and allowing undo after reload.
  • The New Script Wizard now supports adding files to be downloaded and will prompt you if the downloaded file is an archive that should be extracted.
This version also includes a fix: Using [Files] section flags download and extractarchive on an entry that also has a Tasks parameter now works as expected.

Download: https://www.jrsoftware.org/isdl.php

For the complete list of what's new/changed, see: What's new in this version?.

If you are using Inno Setup commercially, please purchase a license. Thank you to everyone who has already purchased a license! If you do not receive your key in your inbox, please check your spam or junk folder. If you still can't locate it, please contact us. Donations are also still welcome and appreciated!

In addition to the above new features, we're also excited to share more work which has already been done and will be available in a future release: we've added support for dark mode (forced or automatic) and custom styles to Setup and Uninstall!

This includes support for dark and custom styled task dialogs. See the example screenshots below. All of this does not increase the size of Setup if not used and is fully backward compatible!

Greetings,
Martijn Laan & Jordan Russell

Future release preview:

Setup in dark mode at 175% DPI:



Setup in the custom light blue "polar" style at 175% DPI: (a dark blue version is also available)



Task dialog in the custom "zircon" style at 125% DPI:



Same task dialog in dark mode at 125% DPI with a right to left language:




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