What are you running (Windows, Mac, Linux, or Android)? What is the exact version of OpenCPN you have installed? What geographic region are you planning to cruise?
If you already have a CM93 v2 folder, install it as described. If you are looking for one, know that any public download violates copyright and contains obsolete data – invest in official charts instead. cm93 v2 charts download install
Turn on OpenGL acceleration. Go to Options > Display > Advanced and check Use OpenGL . This shifts the graphics rendering from your CPU to your graphics card, making zooming and panning instantaneous. What are you running (Windows, Mac, Linux, or Android)
You cannot just "buy" CM93 v2 from a store anymore. Distribution is almost entirely via peer-to-peer and sailing forums (e.g., CruisersForum, Panbo, or OpenCPN user groups). If you already have a CM93 v2 folder,
: Ensure chart quilting is turned on. Press the Q key on your keyboard to toggle quilting on and off. "No Charts Found" Error
: The software cannot find the root files because of nested folders.