You can uninstall Acronis Agent by starting the installation package and selecting Install Backup Client and then Remove or by running /usr/lib/Acronis/BackupAndRecovery/uninstall/uninstall. Should this way not work, you can uninstall Backup Client manually.
Follow these steps to completely delete Backup Client from your system:
1. Remove all modules from dkms:
# dkms status
snapapi26, 0.7.46, 2.6.9-1.667, i686: installed
# dkms remove -m snapapi26 -v 0.7.46 --all