The software application published by Aldec that includes the feature or module called 'RIVIERA_VHDL_DSE_2021.0331' is **Riviera-PRO**. Riviera-PRO is a comprehensive simulation and advanced debugging tool for VHDL, Verilog, and SystemVerilog.
The specific term 'RIVIERA_VHDL_DSE_2021.0331' likely refers to a specific version or release of a feature related to VHDL simulation or design space exploration (DSE) within the Riviera-PRO environment,