You can modify ThinApp parameters to compress file and block sizes for applications. BlockSize ParameterThe BlockSize parameter controls the size of compression blocks only when ThinApp compresses files for a build. CompressionType ParameterThe CompressionType parameter can compress all files in a package except for Portable Executable files. MSICompressionType ParameterThe MSICompressionType parameter determines whether to compress MSI files for package distribution.