Hi Stephane,
I received this error whne updating the module from 1.8.8 to 1.9.0
Could Not Load Theme: /Portals/47/Skins/cpvph/main.ascx, Error: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\cc983dd5\e316d246\App_Web_desktopmodulelightfilter.ascx.8603b2c.xckdigkw.0.vb(59): error BC32206: The project currently contains references to more than one version of Aricie.DNN, a direct reference to version 1.9.3.0 and an indirect reference (through 'Aricie.DNN.Modules.LuceneSearch.UI.DesktopModuleLightFilter') to version 1.9.7.0. Change the direct reference to use version 1.9.7.0 (or higher) of Aricie.DNN