In singapore 0.9.x logs are stored in the data/logs/ directory. In v0.10.x they are stored in the relevant gallery directory (alongside metadata.csv). Hence, if you wish to conserve your exisitng visitor data, it is necessary to copy them from their old location to the new. Note that if you're not bothered about it then new log files will be created automatically and will start counting again from zero.

However the file names are also different. In v0.9.x the name is viewsGALLERYID.log where GALLERYID is the identifier of the gallery with all special characters converted to dashes (-). For example gallery=./mygallery2/something_else would become views.-mygallery2-something_else.log

In v0.10.x all logs are called hits.csv (ah that's easier!).