Launcher icon invokes wrong executable after unlocking and relocking

[Clearstar]

Get Pycharm from http://www.jetbrains.com/pycharm/download/
1. run pycharm3.1 from shell (pycharm3.1/bin/pycharm.sh)
2. click Pycharm icon and lock it to launcher
    quit Pycharm
3. Clicking icon now runs Pycharm 3.1
4. Unlocked Pycharm icon
5. run pycharm3.4 from shell (pycharm3.4/bin/pycharm.sh)
6. click Pycharm icon and lock it to launcher
7 quit Pycharm
8 Clicking icon now runs Pycharm 3.1

8 is unexpected - it should run Pycharm 3.4 as it is this program I locked most recently to the app launcher.

9 Renaming the Pycharm 3.1 directory:
10 clicking the Pycharm icon now fails to start any program
11. Run Pycharm 3.4, and lock it
12. clicking Pycharm icon still fails to start any program.

ADDITIONAL SUGGESTION: right clicking on icon could bring up a properties menu, when selecting that one can see and edit what clicking the icon will run.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.0+14.04.20140423-0ubuntu1.2
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Thu Jun 12 15:35:14 2014
InstallationDate: Installed on 2014-05-02 (40 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)