You want to use a extension, that is compatible with ComBoot?
- Download and install the extension you want to use (from: https://www.phpbb.com/customise/db/extensions-36)
- More infos about installing an extension here: https://www.phpbb.com/extensions/installing/
- Purchase and download the compatible package from the ComBoot extensions database
- Now ensure, that the ComBoot style folder is named
ComBoot-3.1-masterlike it is, when you download it from github). If not, rename it.
- Last but not least upload the ComBoot compatible package into the
/ext/folder of your phpBB installation