EasyEDA: äldre versioner att ladda ner

- Remove online talk tool Tawk, using JLC online talk

- BUG fix for JLCPCB ordering

- Fixed the PDF export error of 90 degree images

- Remove the name and designator from the symbol wizard dialog
- Modify the line width of the exported slot to 0.1mil
- Fix the problem that the document cannot be restored when opening a read-only project in the offline mode of the project
- Fix the problem that the search results of the personal 3D library cannot be deleted by right-clicking
- Fix the problem that some files will have an extra line when exporting Gerber
- Add an automatic pin layout function to the symbol library tool menu
- Fix the problem that the test time is displayed incorrectly
- DRC check adds a warning for non-plated pads
- Update language translation

- Fixed the problem that the simulation common library 1N4148 will change when switching to 3D and then switching back.
- Fixed the issue where Gerber exporting large files did not add date to the file name.
- Fixed the issue where the point option style was not grayed out when exporting coordinate files was not checked.

- Fixed the problem of directly exporting Gerber error when opening an online open source project
- Fixed the issue where when a project is opened in the education workspace, the editor does not automatically switch to the project area and open the project.
- The right-click menu of the component library list adds a menu to create multiple sub-libraries.
- Fixed the problem that when the searched library has sub-library, the parent library cannot automatically switch to other sub-library.

- Fix copper area ratline incorrect issue

- Fixed the problem that the DRC of copper area detection is incorrect issue

- The client framework is updated to electron 19.1.9 to solve some primitives that could not be displayed due to the low version of the kernel, etc.
- Fixed the problem that some attributes of BOM exported from old files did not appear
- Right click on the component to update from the library, and add a warning pop-up window in the design menu to update from the library
- V-CUT panelize removes the protruding V secant segment
- Gerber supports the output document layer, panelize comments are placed on the document layer
- Optimize the display method of the list on the left side of the DRC, and display it in groups

- Fix some permission control issues

- Fixed an issue where components with sub-parts placed in the mall engine could not place sublibraries consecutively
- Fixed Export PDF selection separation layer with the same content for each file
- Adjust placement pad default solder resistance extension to 2mil

- Fixed the problem that the duplicate designator was not detected when the subpart U1.1 and the non-subpart U1 were the same
- Updated translation, added Arabiclanguage
- Fixed an issue where some polygonal pads had abnormally sharp flux extensions
- Fixed an issue where purple blocks style would appear on the desktop client side

Improvements
- Fix PCB Import Changes twice will appear remove all parts and place new parts issue
- Import 3D dialog add file type tip
- Add error message when save library appear parameter error

Improvements
- Support Copper Area 45 degree grid
- Support popup when exporting Gerber encounters unsupported polygons
- Support export BOM support to select the required attribute name as table header
- Support rotation angle of PCB bottom components in line with Altium's rotation method
- Support tools menu to add Batch Vias for Copper menu
- Support the view menu to add a unit switching portal
- Support export DXF support full elements and layers, support layering
- Support for exporting Altium ignore shape layers
- Support opening document pop-ups to prompt component library update dialogs
- Track length adjustment supports single-sided swing adjustment
- Optimize canvas right-click menu grid and snap switching parameters
- Fix the problem of opening very old PCB without automatic copper pour
- Fix the problem that pads can be dragged when text and locked package pads are dragged together
- Fix the problem of invalid coordinate shift of PCB package pad setting
- Fix the problem of copper area on top of multi-layer pads after rebuilding copper area
- Fix the problem of incorrect value of comment of imported Altium Designer schematic
- Fix the problem of incorrect processing of PCB inner layers imported Altium Designer PCB
- Fix the problem that the polygon pads imported Altium Designer PCB are incorrect
- Fix the problem that DRC spacing error will be reported when the spacing of copper area property is set to 0.5mm
- Fix the problem that PCB track deletion nodes do not delete track segment normally

Desktop Client
- Support "online_projects_backup" and "offline_projects_backup" folder, the desktop client will save a backup when you saving a file
- "online_projects_backup" folder: Avaliable at Team Work Mode, only backup the file you saved
- "offline_projects_backup" folder: Avaliable at Project Offline Mode, it will backup the project every time when you save the file, you can recover the histories very easy
- Support to move the deletion project to "offline_projects_backup" folder at Project Offline Mode

Improvements
- Fixed a simulation issue