I've just installed Contour on my local Umbraco development site, realised it was overkill, uninstalled it, and now all of my pages output 'Error parsing XSLT file' wherever I previously had a perfectly working macro.

I.e. Contour killed my work :(

I could reinstall it and leave it redundant in the backoffice, but that's hardly its designed behaviour.

Here's the stack trace (I get an entry like this for each macro). I'm a website builder, not a low-level .NET developer, so any tips would be very much appreciated.

umbracoMacro InnerException
Unable to load one or more of the types in assembly 'Umbraco.Forms.Core, Version=1.1.0.25390, Culture=neutral, PublicKeyToken=null'. Exceptions were thrown:
System.IO.FileNotFoundException: Could not load file or assembly 'Umbraco.Forms.References, Version=1.0.10920.32880, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
System.IO.FileNotFoundException: Could not load file or assembly 'Umbraco.Forms.References, Version=1.0.10920.32880, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
Unable to load one or more of the types in assembly 'Umbraco.Forms.Core, Version=1.1.0.25390, Culture=neutral, PublicKeyToken=null'. Exceptions were thrown:
System.IO.FileNotFoundException: Could not load file or assembly 'Umbraco.Forms.References, Version=1.0.10920.32880, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
System.IO.FileNotFoundException: Could not load file or assembly 'Umbraco.Forms.References, Version=1.0.10920.32880, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
  at umbraco.BusinessLogic.Utils.TypeFinder.FindClassesMarkedWithAttribute(Assembly assembly, Type attribute)
  at umbraco.BusinessLogic.Utils.TypeFinder.FindClassesMarkedWithAttribute(Type attribute)
  at umbraco.macro.GetXsltExtensionsImpl()
  at umbraco.macro.<GetXsltExtensions>b__4()
  at umbraco.cms.businesslogic.cache.Cache.GetCacheItem[TT](String cacheKey, Object syncLock, CacheItemPriority priority, CacheItemRemovedCallback refreshAction, CacheDependency cacheDependency, TimeSpan timeout, GetCacheItemDelegate`1 getCacheItem)
  at umbraco.macro.GetXsltExtensions()
  at umbraco.macro.AddMacroXsltExtensions()
  at umbraco.macro.GetXsltTransformResult(XmlDocument macroXML, XslCompiledTransform xslt, Dictionary`2 parameters)
  at umbraco.macro.loadMacroXSLT(macro macro, MacroModel model, Hashtable pageElements)