I knew of a couple of bugs and someone drew my attention to another, so here's a new version that fixes those bugs.
- Rename dialog now automatically updates the filename textbox to match the template (if there is one).
- "View EPub" button now stays enabled when opening another file (only happened if there was no ini file in the program's directory).
- Problem with adding cover image fixed (occurred when opf file did not contain carriage returns).
- Program window should now look correct under different screen aspect ratios.
Let me know if you notice anything!