Zenses2 lies within System Utilities, more precisely System Optimization. The most popular version among the software users is 2.0. This free software is a product of Sixones. Zenses2.exe is the common file name to indicate the Zenses2 installer.
From the developer:
Zenses is an open source application scrobble tracks from MTP compatible devices (Microsoft Zune, Creative Zen, SanDisk Sansa etc..) to last.fm. Scans through your device to find played tracks to scrobble to last.fm, Zenses will automatically create a timestamp (as MTP devices do not store this information) for each track so last.fm wont reject scrobbles.
You may want to check out more software, such as System Pitstop, Avdump GUI or RegistryClear, which might be related to Zenses2.