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Version for Windows (64 bit): Chemcraft_b770bt_win64.exe - Self-installing executable, 38 MB. Chemcraft_b770bt_win64.zip - WinZip archive without installer, 54 MB.
Version for Windows (32 bit): Note that the Win32 version of Chemcraft can exhibit some bugs on Windows 8 or Windows 10, unlike the Win64 version. On the other hand, possibly the Win32 version is better for running on Linux or Mac with Wine. We have found that sometimes the Win64 version does not run in Windows, while the Win32 version runs properly.
Version for Linux: Chemcraft_b638l_lin64.7z - 7z archive, 13 MB (Linux 64 bit). At this webpage you can download the beta Mac version of Chemcraft (for ARM or Intel).
Note that the Linux version of Chemcraft and especially the Mac version have rather significant problems, we were unable to make them as good as the Windows version. With any OS, you should use the trial version and check whether it works properly on your computer before purchasing.
Installation problems Currently we do not use code signing with Chemcraft, and because of that, the Windows Defender Smartscreen may block Chemcraft from launching and display the following message: "Microsoft Defender SmartScreen prevented an unrecognized app from starting. Running this app might put your PC at risk.". To proceed, click the "More info" link, which will reveal an additional "Run anyway" button. Clicking this will allow you to launch Chemcraft successfully. After the initial launch, Microsoft Defender should no longer flag Chemcraft as suspicious. Please note that the "More info" link might not appear if you do not have administrative rights on your computer (e.g., if it is managed by an IT department). In such cases, you will need to contact your IT support to install Chemcraft on your behalf. One
more issue is that the Windows version of Chemcraft is protected by a
third-party anti-hacker software (The Enigma Protector), and because of
that, some antivirus programs can produce false positive detection of
viruses with Chemcraft. If such
a problem occurs, you can try old or alternative versions of Chemcraft (see
links below). If you are highly concerned about the risk of catching
computer viruses, at this webpage you can see our own anti-virus tests with
the latest versions of Chemcraft made with VirusTotal public service.
Versions of Chemcraft protected with other anti-hacker packages
Additional remarks The .exe distribution is registered in Windows when installed, so for its uninstallation you need to run the unins000.exe file or go to Windows control panel / programs. At the same time, to install a zip archives, you need to only unpack it into a new folder (it is not registered in Windows as software, so for their uninstallation you should simply delete this folder). Maybe it can be not a bad idea to install several builds of Chemcraft on one computer, because sometimes new versions have new bugs, and old versions of Chemcraft (in particular b405) provide saving gif files with transparent background. If you unzip an old build into a separate folder, this will not disturb the work of the main version. With the .exe distributives, a new version of Chemcraft can be installed over previous ones (installed via .exe too), keeping old display schemes.
Please do not install Chemcraft into "C:\Program files\Chemcraft" folder, this can cause problems.
Here you can download very old reduced freeware version of Chemcraft for Windows with many limitations.
You
can get the Chemcraft license for free if you help us with the development
of the program, in particular if you find 2 or more bugs in it. If you work under Mac/Linux and want to use the Windows version of Chemcraft, you should install Wine: here is the installation manual.
We also recommend using alternative versions of Wine: CrossOver (a paid version of Wine) and Parallels (a paid Windows emulator on Mac).
Please email to our Support if you experience problems with installation or running of Chemcraft.
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