How do I get BioWin or update to the latest version?

Updated

EnviroSim provides two direct paths on its website: Get BioWin to obtain the software, and Update Current Version to bring an existing installation up to date. The version shown on the site is 6.5.4.5173 (updated 7.28.2026). If your license needs renewing or you have an invoice to pay, use the separate Renew License / Pay an Invoice page rather than the download links.

Getting BioWin for the first time

  1. Go to envirosim.com.
  2. Use the Get BioWin link on the homepage.
  3. Follow the instructions provided there to obtain the software.

BioWin is EnviroSim's flagship wastewater treatment process simulator. It ties together biological, chemical, and physical process models, and is used by consulting engineering companies and utilities worldwide to design, upgrade, and optimize municipal and industrial treatment plants.

Updating an existing installation

  1. Go to envirosim.com.
  2. Use the Update Current Version link.
  3. The current version listed is 6.5.4.5173, dated 7.28.2026 — compare this against the version you are running to confirm whether an update applies.

The update path is intended for users who already have BioWin installed. If you are starting fresh, use Get BioWin instead.

License renewal and payment

Task Where to go
Renew a license or pay an invoice Renew License / Pay an Invoice page
Manage payment methods My Account → Payment methods

These are separate from the download and update links, so handle licensing and billing through the account pages rather than the software links.

What to check before updating

  • Version number: confirm your current build against 6.5.4.5173 to see whether an update is needed.
  • License status: if your license has lapsed, renew it through the invoice page before or alongside updating.
  • Account access: payment methods are managed inside your account, so make sure you can sign in.

Related questions

  • What is BioWin wastewater modeling software used for?
  • What is EnviroSim and what does the company do?
  • What is BioTwin and how does it relate to BioWin?