I think your best bet might be to keep using hot seat and just email or drop box the save file back and forth.

Like this

Those two files need to be directly under the campaign folder.
You have them in a folder one level too deep.

Move the files and delete the TRP 1.11c folder

No, it's too deep move those unzipped files directly under the campaign folder and delete the TRP zip folder.

There are 2 campaign folders. The one above is the official game dev one.

The one for mods is in a different location, typically under a 'my games' folder.

Is there a drop off date for old challenges?
Some of these are 9 months old.

They are a custom part of the mod/campaign. You can't use custom countwrs from another mod with this one due to unit type deisnations in this mod.

Yes for TRP WiE.
Not so much for TRP WaW.

Here's the link to my site.
We're starting on Oct 1st, 2025
Taxman's youtube

Here's the link to my site.
We're starting on Oct 1st, 2025
Taxman's youtube

FYI African elephants used in ancient warfare were not those of current day. Either a smaller barient/pop or a different type. The IAsian elephants used by Mauyra were larger, better trained than the African ones. Look ot up.

There's no need you'll get half the mpp value of the second chit back when the tech completes.

The resources that get the explosion effect are reduced a bit like light strat bombing.

It's true(ish), particularly if you are only worried about defensive S&I.

However, more countries investing mean more chances at breakthroughs to get ahead. Also more countries investing will mean more intelligence unit reveals.

You should get to the point where either strategy is easy. Then too easy, so you up the difficulty. After that it's multiplayer... things you can do vs. the ai (like pull Spain in regularly) won't fly. If you don't like the 'unrealistic' moves you will encounter (and need to use) in mp, then look ...

I've moved on to a mod that significantly alters the game and handles research choices differently, so I'm not sure I can offer much advice.

Having said that, in the base game getting to ground attack 2 allows the TAC bombers to de-entrench. Also Spying and Intelligence is more important than you ...

Buy an HQ early to help with France.

After Poland falls I also suggest replacing (use the stack/replace with option via right click) one of the weaker hqs or one that gets a pip of experience with Manstein.

HQs are the most important units in the game and are strong force multipliers.

Pay ...

You can get the update from the store/your account/my games

Yes, but it's been quiet as Lothos is taking a break from TRP.

I had no issues with it (1.10b) and am playing a pbem game as well.

Maybe your download was corrupted?
Or do you have other mods turned on that could be causing an issue?