diff --git a/manifests/ChemAxon/markusheditor/21.3.yaml b/manifests/ChemAxon/markusheditor/21.3.yaml
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+# ================== General ==================
+Id: ChemAxon.markusheditor
+Name: Markush Editor
+Publisher: ChemAxon
+Author: ChemAxon
+Description: Creating a patent claim that covers all of the desired compounds, without any overlap with prior-art documents, can be a challenging task and a huge responsibility. Markush Editor assists you in all the steps of the drafting process, saves time and effort, and helps create strong, high-quality claims.
+#AppMoniker: 
+Tags: chemistry,organic chemistry,molecule,java,jchem,research,patent
+FileExtensions: mrv,cxsmi,cxsmiles,cxsma,cxsmarts,abbrevgroup,csmol,csrxn,cssdf,t,csrdf,mol
+#Protocols: 
+
+# ================== License ==================
+Homepage: https://chemaxon.com/products/markush-editor
+License: Copyright (c) Chemaxon
+LicenseUrl: https://docs.chemaxon.com/display/docs/End+User+License+Agreement
+
+# ================= Installer =================
+Version: 21.3
+InstallerType: msi
+Installers:
+  - Arch: x64
+    Url: https://dl.chemaxon.com/markush/21.3.0/markush-editor_windows-x64_21.3.msi
+    Sha256: e9ef87b0b70481e047cee167ce03ecc742573722a90b1d08017e48a6922bce3f
+    #Switches:
+    #  Silent:
+    #  SilentWithProgress: 
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