You might have more success when you ask for that on this forum:
https://forums.triplea-game.org/
Good luck :-)
Current stable is 2.2.20790
Savegames from 2.0 and 2.1 are compatible.
Current stable is 2.2.20868
Savegames starting from 2.0 are compatible.
Note: To avoid issues it is always recommended that all players use the latest stable version to beginn new games. So when playing together, reassure yourself that everyone is up-to date.
Current stable is 2.3.22161
Savegames from 2.2 are compatible.
Note: To avoid issues it is always recommended that all players use the latest stable version to beginn new games. So when playing together, reassure yourself that everyone is up-to date.
In case any player is not up to date chances are high, that proceeding a game started with the current version with an outdated TripleA-version will corrupt the game or at least aspects of the game.
Current stable is 2.4.22192
Note: To avoid issues it is always recommended that all players use the latest stable version to beginn new games. So when playing together, reassure yourself that everyone is up-to date.
In case any player is not up to date chances are high, that proceeding a game started with the current version with an outdated TripleA-version will corrupt the game or at least aspects of the game.
Current stable is 2.5.22294
Note: To avoid issues it is always recommended that all players use the latest stable version to beginn new games. So when playing together, reassure yourself that everyone is up-to date.
In case any player is not up to date chances are high, that proceeding a game started with the current version with an outdated TripleA-version will corrupt the game or at least aspects of the game.
Current stable is 2.6.14752
Release Notes: https://triplea-game.org/release_notes/
Note: To avoid issues it is always recommended that all players use the latest stable version to beginn new games. So when playing together, reassure yourself that everyone is up-to date.
In case any player is not up to date chances are high, that proceeding a game started with the current version with an outdated TripleA-version will corrupt the game or at least aspects of the game.
So in case you are still on 2.5 or on an older 2.6 version it is recommended to finish your games with those. Savegames are not compatible!
The developers reverted back to 2.522294, as it turned out that currently 2.6 versions don’t work properly with the so-called “bot-play” in the “Lobby”.
This does not affect play by forum of course.
In case you play lobby/bot you should use 2.5.22294 to do so.
People who prefer to use a current pre-release can download those here:
https://github.com/triplea-game/triplea/releases/
Because of irritations about the current “stable” version, here is an update.
What currently is called “stable” is still the outdated version 2.5.22294 from early November 2020, mentioned in my above last posting. However there have been hundreds of (pre-) releases until today’s version (as of writing this:) 2.7.15614.
Be aware that calling “stable” does not mean, that newer versions are “unstable”. On the contrary, those contain a lot of bugfixes and improvements.
I have always recommended to go with a current (pre)-release as long as you don’t need lobby play.
As posted frequently above and elsewhere this is the link …
https://github.com/triplea-game/triplea/releases
… where you can download the latest and hundreds of older versions.
Note: At any time during 2.6 development savegame compatibility broke (between older versions and versions starting from this specific one). Players should use the same (pre-)release version, currently 2.7.xxxxx. Also they should compare their game versions and agree on a specific version before starting a game. However, there is absolutely no reason to go with any outdated 2.6 version.
So either you go with "stable " 2.5.22294 accepting the almost six years old issues - or you agree to go with a current prerelease.