we own the original dashcoin git.

Official Statement On Rebranding To Dash:
"Months ago the community organically came up with the name “Dash” as a possible rebranding idea of Darkcoin, I took notice of this and the good deal of support it had in the forums. This lead to us researching the Dash brand for a few months. In the process of doing some investigation, we found that there was another company in the financial space that was filing a trademark. This resulted in me buying another coin “Dashcoin” and challenging their trademark application."
"we were in control of the Dashcoin project. Acquiring Dashcoin is no different than getting a previously existing domain name, the acquired project itself will not continue only the DRK project will move forward under a new name."
https://dashtalk.org/threads/official-statement-on-rebranding-to-dash.4297/

Dash Birthday / Trademark Resolution / Blocksize Limitation:
"We are also happy to announce the legal procedures have concluded and we and our service providers can safely use the brand Dash in everything that relates to virtual currencies. With this Dash becomes one of the few cryptocurrency projects with well-defined trademark rights."
https://dashtalk.org/threads/dash-birthday-trademark-resolution-blocksize-limitation.7696/#post-79144

Dash Cryptocurrency Secures Trademark Rights, Moves to Increase Block Size to 2 MB
http://allcoinsnews.com/2016/01/19/dash-cryptocurrency-secures-trademark-rights-moves-to-increase-block-size-to-2-mb/

Your coins are fine, of course. If you want the code to be upgraded/maintained/fixed(if it breaks), you better find a new developer to do it, because the original developer has sold out and the acquirer has said he won't be continuing it.

it looks like it