Unable to open script file"C:\Program Files\Adobe\Adobe Dreamweaver CC 2018...

I installed WAeCart_612.zxp into Dreamweaver CC 2018. When I started Dreamweaver I get this error message: The Following JavaScript error() occurred: Unable to open script file "C:\program File\Adobe|Adobe Dreamweaver CC 2018\Configuration\Shared\Webassist\eCart\Wa_RunCommand.js (error 3).

How can I fix this or delete eCart? I really don't need it right now.

If you open up a page in dreamweaver after installing it should run a secondary installer. Then after that runs you restart Dreamweaver one more time and it should have created that file and the error will go away.

If you have issues you can also reinstall the extension to start the process over and it should work. The steps are:
1) Close Dreamweaver
2) Install the extension
3) Open Dreamweaver
4) Open a new page and let the secondary installer run
5) Restart Dreamweaver

Thank you. All is well

When installing 1.15, CC Extension manager says, "The extension cannot be installed, it requires Dreamweaver version 9 or greater."

The webassist menu item is in Dreamweaver. Apparently it partly installed on a previous attempt or its left from an earlier install. It doesn't show in the extension manager.

How can the extension be completely removed to try a re-install?
How can it be installed?

Windows 7

UPDATE: On opening DW and the first time I open a file, it says it can't find wa_conifiguration.js...twice, one in Library and once in Library2.

Try installing using the DMXZone Extension manager or the Project7 version:
https://www.dmxzone.com/go/22670/dmxzone-extension-manager-for-dreamweaver/
http://www.projectseven.com/products/ex-man/info.htm

Thanks for the fast reply. I'll give that a go.