You have the most recent version. The latest disk version is 1.0034A, which people often abbreviate to 1.34 (ie drop the leading zeros); similarly the download version number is often just written as 1.5. There were a couple hotfixes for the disk version of DD (original English release was 1.0029A), with the 1.34 patch being the first official patch that went through the publisher. Apparently they went with 1.0 because it was the first patch, rather than adopt the game's version number.
