Your standalone version is LR5 or older, which cannot read catalogs from the newer version. LR catalogs are not backwards compatible.
In CC, you could select all the images you want to work with in the older version, and go to Metadata > Save metadata to files (Ctrl+S).
Then you could import them in the old version, with develop settings and keywords. Features new to CC would not carry over.
And the History panel will not list your edits, but all the sliders will be in the right place.
The best, and easiest thing would be to continue working in CC, and stop using the older version.