Following the previous revision, today PlayStation Vita developer @CelesteBlue updated the ePSP Bubble Installer for PS Vita to version 3.1 with the changes below. 
Download: ePSP_Bubble_Installer_v3.1.vpk (5.24 MB) / Readme_v3.1.txt
To quote from the GekiHEN page on the latest release: EPSP BUBBLE INSTALLER 3.1
This is a tool that quickly installs a mini ePSP bubble for use with Adrenaline or ARK. No need to be on IDU or to have a PS3. Moreover, the bubble will only cost you 3.5MB !
Since v2.0, you can even activate your PSVita directly through the app ! Since v3.0, you can clone ePSP bubbles and delete them if needed. Open the app and follow what is written on screen. Enjoy, finally, ARK and Adrenaline.
Changelog:
3.1 (2017-03-19)
Download: ePSP_Bubble_Installer_v3.1.vpk (5.24 MB) / Readme_v3.1.txt
To quote from the GekiHEN page on the latest release: EPSP BUBBLE INSTALLER 3.1
This is a tool that quickly installs a mini ePSP bubble for use with Adrenaline or ARK. No need to be on IDU or to have a PS3. Moreover, the bubble will only cost you 3.5MB !
Since v2.0, you can even activate your PSVita directly through the app ! Since v3.0, you can clone ePSP bubbles and delete them if needed. Open the app and follow what is written on screen. Enjoy, finally, ARK and Adrenaline.
Changelog:
3.1 (2017-03-19)
- Fixed bubbles removal function
- Added ePSP bubble duplication: quickly, up to 99 ePSP bubbles !
- Added ePSP buble removal
- Fixed PSN activation for some unlucky PSTVs/PSVITAs
- Entirely compiled with latest ***
- New livearea picture by chronoss