Installing an Older Version of SAMSON: A Clear Guide

In the world of molecular modeling, stability and compatibility are key for a seamless workflow. Many users find themselves needing to install an older version of SAMSON, whether for compatibility with specific extensions, repeatability in research, or personal preference for a previous version’s functionality. This blog post provides a detailed guide on how to install an older version of SAMSON using the same installer that you use for the latest versions.

Why Install an Older Version?

There are several reasons why molecular modelers might need an older version of SAMSON:

• Older extensions: Some extensions may not be updated for the latest version yet.
• Reproducibility: Research protocols might dictate the use of a specific version to maintain consistency in results.
• Performance: Certain legacy systems may function better with older versions.

Regardless of your reasons, SAMSON offers a straightforward way to set up prior versions with the same installer used for new releases.

Step-by-Step Guide

Follow these steps to install an older version of SAMSON:

1. Download and launch the current SAMSON installer. This ensures compatibility and includes the ability to choose older versions.
2. On the second step of the installation process, check the option labeled Install an older version. This step allows you to select previous versions of SAMSON. Here’s what the installer screen looks like:

   

3. Proceed to the next step, where you’ll be presented with a list of older versions. Select the version you need and continue with the installation. You’ll notice that versions are listed with their developer version numbers but can also be mapped to calendar years. For instance, version 2.0.2 aligns with the 2021 release.
4. If you are unsure which version corresponds to the developer version number, you can refer to this additional resource: User Guides for Other SAMSON Versions.

Here’s what the selection of older versions looks like during the installation:

Managing Multiple Versions

If you have multiple versions of SAMSON installed and want to launch a specific one, you can do so manually. Below are instructions based on your operating system:

• Windows:
  C:/Users/%USERNAME%/OneAngstrom/SAMSON-Application/[VERSION_NUMBER]/Binaries/SAMSON-Core.exe

  1	C:/Users/%USERNAME%/OneAngstrom/SAMSON-Application/[VERSION_NUMBER]/Binaries/SAMSON-Core.exe

• MacOS:
  $HOME/Applications/SAMSON.app/

  1	$HOME/Applications/SAMSON.app/

• Linux:
  $HOME/OneAngstrom/SAMSON-Application/[VERSION_NUMBER]/Binaries/SAMSON-Core.sh

  1	$HOME/OneAngstrom/SAMSON-Application/[VERSION_NUMBER]/Binaries/SAMSON-Core.sh

Conclusion

Installing an older version of SAMSON is a flexible solution for researchers and professionals navigating specific needs in their workflow. With SAMSON’s intuitive installer, this process is seamless and ensures access to the tools and functions you rely on.

For additional details and guidance, visit the official FAQ documentation page.

Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON at https://www.samson-connect.net.