FormLoom 2.0.4 adds several advanced formatting options that were not available in previous versions. Some of the default settings for the new options may cause layouts in existing forms to change. Don't worry, it's an easy fix.
FormLoom now allows you to select either fixed or dynamic column widths. In addition, under the Style Menu -> Custom Settings we've added an option for you to define the Start Column width. See this screencast for details on working with the new layout options: