I found this post from 2012 ...

“As I heard complete story:
First was LX Navigation company and they developed all instuments
Colibri lx16, lx166,lx7000, lx7007 itc.. and also lx8000.
Then some developers left the company and start new bussines with
LXNav company.
Mr. Rojnik gave them rights to sell LX8000 product + also the get
market, NAME and dealers.
At first they were working friendly companies, but if you sell similar
products it can cause that happened here.
They become biggest competitors.”

But there seems ti be more to it than that. The LX1000 was a Dittel. The LX4000 was a Filser. These were German companies that changed ownership and evolved over time to new entities. It seems that LX Navigation (and later LX Nav) may have been offshoots of some sort. I’m just as confused about it as you though.