I have several Extensions I cannot update in Dreamweaver CS6 on Mac running OS X 10.11.6. DMX Extension Manager shows downloaded and updated. Does not show via DW CS6 Extension Manager. After rebooting, shows error. A file is not in the Adobe Floaters folder. Here is the notice:

The following JavaScript error(s) occurred:

At line 261 “Macintosh HD:Applications:Adobe Dreamweaver CS6:Configuration:Floaters:dmxBootstrap3Grid.htm”:dwscripts.findDOMObject(“uiLoader” has no properties

I have tried many times, reinstalled, rebooted, etc. If I try through Dreamweaver Extensions Manager, it only gives option to purchase at full regular price rather than any upgrade option.