It could be that you are getting the 'In use' message because your browser has the plug-in running. Try turning all your browsers off and then try to uninstall again.
Then (1) run down the 'Start - all programs' list to Soda. If it shows up with a yellow folder symbol beside it, double click on it and see if there is an 'Uninstall' entry in the folder. If there is, then double click on it to run the uninstaller.
Or (2) go to 'Control panel - programs and features' and try uninstalling it through that.
And (3) if that doesn't work, then try Revo or the uninstaller of your choice again. But turn your browsers off first.
Edited by Chris Cosgrove, 23 January 2016 - 05:34 PM.