How do I convert my old C2 PRojects into C3?

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- nutmix
- - Joined 16 Aug, 2012
  - 145 topics • 372 posts
- 1
- 4 Jul, 2026
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I tried to load my old capx into C3, and get the below message.

My question is, is there any way to get the required plugins for C3, or should I abandon the entire project?

The project you are opening uses the following addons that are not installed. Try installing these missing plugins, behaviors and effects and then re-open the project.

Plugin Function (Rex_Function) by Rex.Rainbow (legacy SDK v1)

Plugin WebStorage (WebStorage) by Zack0Wack0/Scirra (legacy SDK v1)

Plugin Random Array2 (rA2) by Joe7 (legacy SDK v1)

Behavior MoveTo (Rex_MoveTo) by Rex.Rainbow (legacy SDK v1)

Note: legacy (SDK v1) addons are no longer supported in this release of Construct and so cannot be installed. The last release that supports legacy addons is the r449 LTS release. See the LTS releases page, or contact the addon developer for an updated version of the addon.

I tried openging the project in r449, but get this error:

The project you are opening uses the following addons that are not installed. Try installing these missing plugins, behaviors and effects and then re-open the project.

Plugin Function (Rex_Function) by Rex.Rainbow (legacy SDK v1)

Plugin WebStorage (WebStorage) by Zack0Wack0/Scirra (legacy SDK v1)

Plugin Random Array2 (rA2) by Joe7 (legacy SDK v1)

Behavior MoveTo (Rex_MoveTo) by Rex.Rainbow (legacy SDK v1)

Note: legacy (SDK v1) addons are no longer supported in this release of Construct and so cannot be installed. The last release that supports legacy addons is the r449 LTS release. See the LTS releases page, or contact the addon developer for an updated version of the addon.

Note: this project uses the legacy C2 runtime, which has since been removed from Construct 3. You can also try importing the project to C3 r251.2, which is the last release that included the C2 runtime. Then you can upgrade it to the C3 runtime and import it to the latest release. Learn more

I could not find any mention of how to install plugins in the manual unfortunately, for any version.
Tagged:

construct2
construct3
how-do-i
old
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- R0J0hound
- - Joined 15 Jun, 2009
  - 91 topics • 7,672 posts
- 1
- 4 Jul, 2026
- Quote
To open in c3 you’ll have to install versions of those plugins that were ported to c3.

To install a plugin you either have to drag the c3addon file onto the c3 window, or go to menu->view->addon manager to install them from there.

You’ll have to hunt to see if the plugins you need were ported from c2 to c3. Not all were, but from what I’ve seen a fair amount have been on the forum. There is even a webpage someone made that has a running list of ported plugins.

You could also open the project in c2 and remove those plugins so you can load the project in c3 before re-adding the functionality in a c3 way. But that depends on how much you want to mess with it.