Changes

Windows Display Scaling
- Now supported with new AstroImageJ.exe launcher. To install the new launcher, either install the new installation package from the website, or update to 5.1.0.00 (or later) twice.
General
- AIJ notifies user when a new released build is available upon startup.
- Fixed image display maximization on multiple monitor systems.
- New installs now default to allow up to 75% of physical system usage, but can still be overridden from Toolbar options setting as before.
- Windows launcher will update as needed on windows systems.
- Changed default measurements table file type to .tbl.
- .tbl filetypes can now be set to open AIJ upon double-click (and .plotcfg if named with the same file prefix as the table file).
- Fixed export of fractional fps AVI files
- Added AIJ log file to capture stdout warnings and errors
NEBcheck
- Changed max length of data from 3,000 to 10,000 photometric samples.
FITS reading/writing
- Various new 3D FITS format reading supported (i.e. multi-image FITS files).
- 3D FITS format writing support (i.e. multi-image FITS files).
- Load image sequence now allows filtering on up to two fits header values.
- Fixed opening of 64-bit floating point fits images as rounded 32-bit float images.
- Allows opening of hanging HDUs generated by original FITS writer
- Color Image Debayer Support
  1. Revised corrections to debayer pixel interpretations
  2. Renamed debayer options
  3. Support for 8 bit debayering
  4. Fixed debayer not opening on missing keyword
  5. Corrections to debayer pixel interpretations
- Fixed bug that caused fits writer to not write current slice
Multi-plot
- Fixed but the caused the plot to not update under certain conditions when the comp star ensemble is changed in the Reference Star panel.
- Fixed save data subset handling of long data column names.
- Fixed output binning corner-case problem.
- Fixed optimization bug where some threads remained open
- Fix for radec export when Multi-Aperture has not been executed
- Transit fitting bug corrected so that secondary transit location is not fitted with primary transit model
- Cleaning and optimization now allowed with transit model disabled
Multi-Aperture
- Display panel layout has been changed to hopefully improve useability.
- Tooltips have been added to each option (hoover the mouse over the option to read the detailed note – wiggle mouse left and right over note to retain onscreen).
- Fixed variable aperture based on radial aperture usage (sometimes failed and defaulted to user settings)
- In radial profile variable aperture, a stack of radial profile images is created.