I'm sending notice that the 1.5 release line will reach End-Of-Life by Monday 23 December - next week. As per our community policy, there will be no further fixes applied to the 1.5 series of releases. After its initial release on December 23, 2016 and 30 patch releases - the latest released just 16 days ago on November 29 - the 1.5 release line will have received 3 years of support.
Note that even though the community won't provide further releases, the software is considered highly stable and will keep working as it has. This End-Of-Life announcement has no impact on migration paths to newer versions of LedgerSMB: upgrades from 1.5 to more recent versions will remain supported for years to come. (While I'm writing this, I find that we don't currently have a policy in place governing this type of backward compatibility.)
Should you want to keep running 1.5 and be in need of support or maintenance, you could try contacting one of the parties listed on the page for commercial support: https://ledgersmb.org/content/commercial-support. They may be able to provide support beyond the community commitment.
Available options for versions with community support are the 1.6 release line which will receive community releases until June 10, 2021 or the 1.7 release line which will see community support until October 04, 2022.