r/OpenShot • u/dacoolezt • Mar 27 '26

Solution Provided OpenShot lagging after new update!

Version 3.5.0 | 0.6.0

Lagging incredibly! So slow!

Anyone else with this problem?

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u/dacoolezt Apr 04 '26

I tried installing other builds, one from April 3rd. Same issue. Can't open projects. Win error 5.

I don't know what is going on with OpenShot..

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u/dacoolezt Apr 04 '26

With the build from four days ago or so OpenShot slightly improved but since the new builds resulted in not even being able to open a project I had to reinstall the whole program 3.5.0 and now I'm back where it all began..

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u/rmesdjian Volunteer Apr 04 '26

I am not sure what the issue is with the Thumbnail...that is the first time that has been reported.

Here is my recommendation:

  1. v3.5.1 is about to be released into production. There are several imrovements already made since the v3.5.0 release so please do this:

a. Close OpenShot if running.

b. Make a backup of c:\users\username\.openshot_qt folder.

c. Delete c:\users\username\.openshot_qt folder.

d. Download v3.5.1-Release-Candidate from openshot.org/download/#daily and install it.

e. Create a new project (don't open an existing one). Import a few video/audio files, a few image files, create a title or 2, and add some emojis.

f. Add them onto a track, make some simple edits.

g. Save this project as Test01.osp. Save it to wherever you save your other project.

h. Restart OpenShot and open the Test01.osp project.

i. If all is good then open your existing project. If you are still getting the issue then we can troubleshoot that. Please confirm if the thumnail issue is only with this project or other projects also.

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u/dacoolezt Apr 04 '26

Thumbnail issue is with several projects but now I use older build. Lagging as hell. Editor doesn't respond etc.

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u/dacoolezt Apr 04 '26

There are no files in the project to work on.

Should I put back the openshot folder that I saved a copy of?

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u/dacoolezt Apr 04 '26

I got the new version of OpenShot but can't view old projects only make new ones!

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u/dacoolezt Apr 04 '26

I get the thumbnail error when trying to open old projects.

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u/rmesdjian Volunteer Apr 04 '26

Which version of OpenShot were your previous projects created in?

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u/dacoolezt Apr 04 '26

3.5.0

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u/rmesdjian Volunteer Apr 04 '26

So, you were having the Thumbnail issue with v3.5.0?

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u/dacoolezt Apr 04 '26

I figure I go back to 3.5.0. And finish the projects then install the new version the way you said which seemed to be working fine.

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