Tomas,
We keep a minimum of two versions of firmware for each device available for download from the cloud with the app. Once downloaded to your mobile device, you can utilize the “clear saved data” from the menu when on the list page to delete them from the mobile device storage. Note that this will clear all saved firmware as well as your saved login and pin in the app. Doing this every so often can clean up your firmware list.
When firmware is released it is indicated by a blue folder icon on the “Download Firmware” button in the app. The icon will appear if firmware is available but not on the device.
I will conduct a review of the available firmware tomorrow and remove/update firmware on the cloud list as needed.