See https://gretl.sourceforge.net/index.html And for gretl4py (gretl for Python) see https://gretl.sourceforge.net/gretl4py.html Heads-up for Mac users: we've updated gretl from GTK2 to GTK3. So on this occasion we recommend deleting your old Gretl.app before installing 2025a. Here are the gretl changes: 2025-03-20 version 2025a - kalman filter: fixes for variance of smoothed disturbances and some documentation updates - "meantest" and "vartest" commands: support more options and expand their documentation - "system" command, iterated variants: allow more iterations (now 250) before declaring non-convergence - aggregate() function; speed improvement in the matrix case - hyp2f1 function: enhance the documentation - document the $pmanteau accessor for VARs - GUI, preferences dialog: add a tab specifically for plot- related settings - Fix bug: potential crash in the GUI when trying to forecast from an ARIMA model without a constant - Fix bug: "dataset addobs n" with panel data (and without the --panel-time option) was not respecting the documented policy that 'n' refers to the number of cross-sectional units to be added to the dataset - Fix bug: "mpols" was not respecting the --simple-print option, now it does - Fix bug: the "join" command could overwrite some existing data with missing values (contrary to the documentation) in some cases - Fix bug: the RESET test in the GUI was broken when the "show all variants" option was selected (since 2024c) - Function packaging: fix to allow a plot-checker function to be private; documentation updates - markdown parser: improve extraction of URLs - minor code adjustments to comply with the C23 standard - update sourceforge URLs to use https - macOS builds: upgrade to GTK3 - macOS and 64-bit Windows: update gnuplot to version 6.0.2 - Windows 64-bit build: revert to use of MSVCRT rather then UCRT, pending analysis of some problems with the latter - Windows 64-bit build: update to OpenBLAS 0.3.29; fixes for the Windows-10 theme Allin Cottrell