Hi Dave, On my windows platform (Win7), under the Therion folder you should find a "bin" subfolder. In that folder look for a thing called "wish86t.exe". Open that. Then click "Source." and then go up a folder to find "xtherion.tcl". This should open. In my system there is a shortcut: "C:\Program Files (x86)\Therion\bin\wish86t.exe" "C:\Program Files (x86)\Therion\xtherion.tcl" Rowena From: therion-bounces@speleo.sk [mailto:therion-bounces@speleo.sk] On Behalf Of Dave Clucas Sent: Saturday, 17 January 2015 12:29 PM To: therion@speleo.sk Subject: [Therion] Therion doesn't run on Windows I've just installed Therion on a Windows machine. When I click on the Therion shortcut it opens a command window and gives the following error. "C:\Program Files (x86)\Therion\xtherion.exe" is not recognized as an internal or external command, operable program or batch file Running Windows 8 about which I know absolutely nothing, I normally use a mac. Dave Clucas <http://daveclucas.com> daveclucas.com <http://sarawak-caves.com> sarawak-caves.com <mailto:daveclucas@icloud.com> dave.clucas@icloud.com Exploring the World - One cave at a time