The full version from the AGEOD store seems to be the same base version as the demo and with the Paradox arrangement (QA, etc) there may not be a release day patch/hotfix.
So I thought it might be prudent to list some workarounds for issues I have found while playing the current full version (which also exist in the demo, but you don't reach in the limited number of turns).
First in the Russian Events it says EvalColStatus instead of EvalColStatusArea, which for me breaks the game at the start of 1853 when those events are active.
To fix this, those statements need changed, adding Area to the end. Opening */Events/RUS Events.sct with notepad++ or notepad use Find and Replace, replacing all EvalColStatus with EvalColStatusArea.
The AnseiTokei earthquake event occurring later (end of 1854) causes the same problem.
To fix this, in */Events/JAP Events.sct change the statement (line 460)
ChgPopulation = -1;$ethJapanese
to
ChgPopulation = -1;$ethJapanese;$relShintoist;$Area_Osaka
I think the last two modifiers are correct, regardless it will stop the crash.
The third issue was it being unable to unserialize a ruler, some database issue I think. The ruler being KanendjoSamuel for KAN.
I only found a workaround for this, changing the prior ruler */GameDate/Rulers/1830KANruler_KAN_KaouaVendegou.rul to have the EndDate and AbsEndDate (lines 28 and 30) to be in the year 1955, outside of the timeline. Then I changed the StartDate EndDate and AbsEndDate of the two rulers whose files follow in that directory 1831KAN. . . and 1832KAN. . . to have the StartDate EndDate and AbsEndDate be in the year 1955.
This keeps the afflicted ruler from ever coming up in the first place.
Those are the only issues I've found at this point. If I find more I'll update this.
Hopefully this issue is already corrected in other download sources or it can be fixed as it would be a shame for minor issues of this type to damage the launch of such an impressive game.
Probably these issues are already fixed in later versions, but with Paradox issues, QA requirements etc, they may not be able to have a patch/fix available at release. Hopefully this is helpful for the immediate present.