BuildTopia recently launched version 3.5 of its online construction management system. The new release improves the purchasing management and bidding features for both builders and subcontractors. One big change is the ability for subcontractors to generate invoices from approved POs directly from BuildTopia's online system. The upgrade also offers improved bid management tools that let builders list more than one subcontractor per trade on a house. Now, if a subcontractor changes midstream on a project, the builder has a backup bid in place. To learn more, visit www.buildtopia.com.