This is a standard patch release to addressing any reported and discovered issues.
There should be no specific issues when upgrading to this version of translation manager. As a guide we recommend you don't upgrade when you have outstanding translations within your umbraco site.
The Recommended way to install Translation Manager is via nuget as part of your website project
PM> Install-Package JumooTranslate
You can also install translation manager as a package via the backoffice of umbraco. Translation Manager 1.4.1.zip