Fix: How to get the IDE back and AG2

Google Antigravity
1

Here’s what’s going on:

Our old Antigravity is installed in

C:\Users\AccountName\AppData\Local\Programs\Antigravity

But Google decided that this directory will now be the new agent-only “IDE”. So you install AG2 and it installs itself in

C:\Users\AccountName\AppData\Local\Programs\Antigravity

when you then install Antigravity IDE, it also installs itself into

C:\Users\AccountName\AppData\Local\Programs\Antigravity (<- this is the bug)

Here’s how to fix this:

Make a backup of

C:\Users\usr\AppData\Roaming\Antigravity(contains extensions and settings, no code-related stuff)

then uninstall Antigravity 2 (and optionally also the now stale uninstall entry of Antigravity) in Programs and Features.

Then install Antigravity IDE (NOT AG2, this must be done afterwards, if you want to install it at all) and this time it will offer to install into

C:\Users\AccountName\AppData\Local\Programs\Antigravity IDE

Start it once and close it.

Now rename the auto-created

C:\Users\usr\AppData\Roaming\Antigravity IDE to

C:\Users\usr\AppData\Roaming\Antigravity IDE Original

and

C:\Users\usr\AppData\Roaming\Antigravity (or the backup) to

C:\Users\usr\AppData\Roaming\Antigravity IDE

That fixed it for me.

THEN you can install Antigravity 2 and it will install itself into

C:\Users\AccountName\AppData\Local\Programs\Antigravity

an you’ll have the IDE in

C:\Users\AccountName\AppData\Local\Programs\Antigravity IDE

2

“Start it once and close it.” - Before it finishes you mean? Thanks!

It’ll be handy to have steps in your list, so I can refer to it easier.

3

Starting the IDE once after it is installed, so that it creates/populates default directories (which you’ll replace with the backup anyway)

4

Okay, got it!
It worked for me like a charm, thanks for the post!

One thing that doesn’t work much: extentions. Weirdly it refuses to do anything with them right now. Perhaps a short-term bug… I hope.

5

For me the extensions are working.
it did create a new

C:\Users\AccountName/.antigravity-ide while the old ide used C:\Users\AccountName/.antigravity

renaming .antigravity-ide to .antigravity-ide-original and .antigravity to .antigravity-ide restored all the extensions.

6

Hi,

You said: C:\Users\usr\AppData\Roaming\Antigravity IDE Original

But if i’m not wrong, (too scared to try it yet and lose my Antigravity 1.23 installation for good) the new Antigravity IDE has some major differences, mainly it no longer has agent support for complex tasks, those are now in the AG2. The new AG IDE only has autocompletion and some level of code snippet assitance like the first copilot extensions for VSCODE had.

¿Is that so?

7

But still cannot get back 3.1 Flash model

8

I used the " Original" suffix in an attempt to make it clear that this is what the new installer created. Original, because it will be replaced with the copy of the old C:\Users\AccountName\AppData\Roaming\Antigravity

I had no time to do some coding with this new version of the IDE, but it looks like being in a workable state. In the new IDE there is definitely the “traditional” Agent in the right side “Secondary Pane”.

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image1430×788 36.1 KB

9

I’ve read that the agent panel is there for solving simple questions like “give me the python code for a function to connect to …” much like having a browser tab open with gemini but that it has lost the context window, the access to many tools, … that its not fit for agentic development anymore, that all those features are now in AG2, but i have not tested it, thats why i was asking, in case you had tried it. I’m gonna start a VM and try it.

10

How this got tested and approved is beyond me ! IDE is all Antigravity is and it just vanishes after upgrade ?!!!

11

Gemini 3.1 Flash model was never a thing, it was Gemini 3 Flash Preview (aka gemini-3-flash-preview, experiment that still continues but is where 3.5 Flash currently is) (emphasis in the Preview). You can get something similar to the old one with a Studio AI key and configuring it yourself. Currently Gemini 3.5 Flash (low) give me near the same result and quota usage limit (only because of the currently x9 quota increase). It’s still dumber at calling MCP tools for some reason, you have to document them really well for it to handle them correctly.

12

Agree, they did mess up the early release update, as they mentioned on X. But yes, the Gemini Flash and Pro models are good now.

It’s just that now I have to break a single task into multiple smaller subtasks and handle them in separate conversations. It’s not ideal, but that’s what we have to do for now.