Update windows installer

[smk762]

Closes #2108

• Incremented version
• Created DEX_VERSION cmake variable
• Change windows installer path to include version
• Tweaked installer to detect existing installation and remove it before installng

To test:

• Install the app on windows.
• Run the installer on windows again.
• On second installation, you should see a warning message about existing installation in folder.
• Continue anyway
• App should install without complaining.

[endrilickollari]

Looks good in Windows 10:

Did the installation before, installed again warning message appeared:

Did the installation anyway and looked good:

[kivqa]

@smk762
Every installation in same folder displayed as uniqe instance in Control Panel > Programs > Programs and features for Windows 10
If user uninstalls one of these instances then remained instances displayed incorrectly

PR could be approved if it's not critical issue . Or we can submit separate issue.

[smk762]

Thanks for report - I'll see how that can be fixed. What happens when you try to uninstall one of the duplicates from add/remove programs?

[kivqa]

The instances are remained in the program list without icons and it's possible to remove without any affect . But need to test behavior with different folders for instances