I don't care if you only allow simple integers for sequence numbers, I just need to be able to reorder those numbers after I've inserted new messages or removed old ones.

This may be a feature already scheduled, but I can't think of another way to instantiate a template parameter in Star UML

Open a diagram in other window but not at the same viewer.
example: an UseCaseDiagram on the primary display and an ActivityDiagram on the secondary display, both on the same project.

macOS started to complain that application needs to be updated for 64-bit.
Time to update!

snap packages have better compatibility for Linux distros with support for it because all dependencies come inside the packages. Tried to install staruml on Ubuntu 17.10 and 18.04 beta and failed because of dependecies

Please official support for 16.04 Ubuntu by using libgcrypt20 instead of 11

Please support using char '-' in component name, we use that for deploy diagram

Like Sublime Text I think adding a feature that allows you to edit every single key binding so that you can change them to whatever works best for you would be extremely beneficial.

I would like to select part of a class diagram and copy paste it into, for example, word, either as bitmap or as objects.

Please let us change diagram background color, which is now white. White is too aggressive for eyes in dark environment ... I would prefer to change to some greyish tone.

class 를 불러들인 후 해당 클래스를 sequence diagram 으로 적용시킬 때 Lifeline : class Name 형태로 나타나는데
이전에서는 : class name 으로 나타났었습니다.

이건 문제가 없는데 Lifeline 을 삭제 하면 Model Explorer 에서 (Lifeine) 으로만 나타나서 어떤 class 인지 파악하기기 어렵습니다.

예전 버전과 동일하게 :className 으로 나타나게 해주세요

A contextual "rename menu" would be very intuitive when one want to rename a diagram by simply right clicking at it and choosing this "rename menu". A F2 shortcut to the rename option would help to.

Exporting the relationship data model to SQL script for creating a database.

The possibility to create a ddl file to create database.

As a developer of a shared library with an API to document I want to be able to export the diagrams via command line arguments so that I can generate and deploy the documents as part of continues integration via Bamboo etc.

It's really tedious having to download newer versions of my favorite UML tool just to get some bug fixes or new features, I suggest automatic program updates should be used for feature releases and bug fixes.

In order to see if field/column in entity can be null you have to select that field in entity and then refer to properties on properties panel.
Though this field property does mean a lot.