A re-index is necessary when the Last Comment Searcher is chosen as the custom field searcher. Otherwise, re-indexing is not necessary, but recommended.
Yes, you can modify the maximum length of the content in the custom field via the configuration page.
Yes, you need to create a custom field of type: Last Comment and add it to the appropriate screens in order to view the last comment in a custom field.
Please make sure you have created a custom field of type: Last Comment and added it to the appropriate screens.
We recommend using the latest version of our plugin and the latest version of JIRA to avoid problems.
If you would like assistance in upgrading your JIRA instance please contact us.
Please report all bugs at: https://capitalplugins.atlassian.net/browse/LCCF